The Ultimate Guide to Soft & Fluffy Buttermilk Sugar Cookies with Creamy Vanilla Buttercream
Prepare to fall in love with these incredible Buttermilk Sugar Cookies! They are wonderfully pillowy soft, unbelievably moist, and crowned with a luscious, dreamy vanilla buttercream frosting. This particular recipe for buttermilk sugar cookies offers a delightful twist on your average sugar cookie, resulting in a treat that is both delicate in texture and perfectly sweet. Whether you’re a seasoned baker or just starting out, this recipe promises a batch of cookies that are sure to become a cherished favorite.

Crafting these exquisite buttermilk cookies is surprisingly quick and straightforward. You’ll likely find most of the staple ingredients already in your pantry, making this a convenient choice for a spontaneous baking session. The secret to their irresistible texture lies in the buttermilk, which imparts a tenderness and moisture that’s hard to achieve with regular milk. The resulting frosted sugar cookies are fluffy, rich, and truly melt-in-your-mouth – many claim they are the most delicious sugar cookies they’ve ever tasted!
Why Buttermilk Sugar Cookies are a Game Changer
Creating truly exceptional sugar cookies starts with an outstanding recipe, and this one absolutely hits the mark. My journey to this fantastic soft buttermilk sugar cookie recipe began quite unexpectedly. I stumbled upon an intriguing recipe on the back of a sugar package – yes, I’m one of those people who actually reads those! Intrigued by the mention of buttermilk, I decided to give it a try. While the original was good, I made a few small, yet impactful, changes to elevate it to perfection. And honestly, these quickly became one of the best sugar cookies I have ever had!
What makes them so special? Their texture is akin to a soft, fluffy pillow, and the flavor is simply amazing. The slight tang from the buttermilk perfectly balances the sweetness, creating a complex and utterly satisfying taste experience. I’ve brought these delightful treats to numerous family gatherings, and they vanish almost immediately. Even my son, who isn’t typically a big fan of cookies, raves about them. That’s how good they are! If you’re searching for a cookie that will impress everyone and vanish faster than you can bake them, you absolutely must give these soft buttermilk sugar cookies a try. You won’t regret it!

Essential Ingredients for Soft Buttermilk Sugar Cookies
The magic of these cookies truly begins with a careful selection of ingredients. Each component plays a vital role in achieving that signature soft, moist, and flavorful cookie base. Here’s a breakdown of what you’ll need and why:
- Butter: Using ½ cup (1 stick) of softened unsalted butter is crucial. Butter contributes significantly to the richness and overall flavor of the cookies. Softened butter creams beautifully with sugar, creating air pockets that lead to a lighter, more tender crumb.
- Granulated Sugar: You will need ½ cup of granulated sugar. This provides the primary sweetness and helps with the tender texture, contributing to a slight crispness around the edges while keeping the center soft.
- Brown Sugar: For an added layer of sweetness and a wonderful depth of flavor, include ½ cup of light brown sugar. The molasses in brown sugar adds moisture, chewiness, and a subtle caramel note that complements the vanilla beautifully.
- Egg: Just 1 large egg is needed to bind the ingredients together, add richness, and contribute to the cookie’s structure and moisture. Ensure it’s at room temperature for better incorporation.
- Buttermilk: The star ingredient! ¾ cup of buttermilk is essential for making these cookies exceptionally soft, moist, and delightfully chewy. Its acidity reacts with the baking soda to create a tender texture and a subtle tang.
- Vanilla Extract: You need 1 tsp of pure vanilla extract to enhance all the wonderful flavors in this recipe. Don’t skimp on good quality vanilla; it makes a noticeable difference!
- All-Purpose Flour: Use 2 ½ cups of all-purpose flour for the base of this cookie recipe. Properly measured flour provides the necessary structure without making the cookies tough.
- Baking Soda: Adding ½ tsp of baking soda is key. It acts as a leavening agent, reacting with the buttermilk’s acidity to help these cookies rise nicely and become wonderfully fluffy while baking.
- Salt: Only ½ tsp of salt is needed to balance the sweetness of these cookies and enhance all the other flavors, preventing them from tasting bland or overly sweet.

Ingredients for Fluffy Vanilla Buttercream Frosting
No buttermilk sugar cookie is complete without a generous swirl of creamy, homemade vanilla buttercream. This frosting is the perfect complement, adding another layer of sweetness and a velvety smooth texture. Here’s what you’ll need for this irresistible topping:
- Butter: You will need ½ cup (1 stick) of room temperature unsalted butter. Starting with softened butter is crucial for achieving a smooth, lump-free, and airy frosting.
- Vanilla Extract: Use 1 tsp of good quality vanilla extract. It’s vital for infusing the frosting with that classic, comforting vanilla flavor that pairs so well with the cookies.
- Milk: 2-3 tablespoons of milk will help you achieve the perfect consistency for your frosting. Add it gradually until your buttercream is wonderfully smooth and spreadable. Any type of milk (whole, 2%, skim) will work.
- Powdered Sugar: Adding 2 rounded cups of powdered sugar (also known as confectioners’ sugar) is what gives this frosting its sweetness and incredibly fine, smooth texture. Sifting it beforehand can help prevent lumps.



Buttermilk Sugar Cookies Recipe
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Ingredients
Cookie Dough
- ½ cup softened unsalted butter (1 stick)
- ½ cup granulated sugar
- ½ cup light brown sugar
- 1 large egg
- ¾ cup buttermilk
- 1 tsp pure vanilla extract
- 2 ½ cups all-purpose flour
- ½ tsp baking soda
- ½ tsp salt
Amazing Vanilla Buttercream Frosting
- ½ cup room temperature unsalted butter (1 stick)
- 1 tsp pure vanilla extract
- 2-3 TBSP milk (adjust for desired consistency)
- 2 rounded cups powdered sugar (confectioners’ sugar, sifted if clumpy)
Instructions
Making the Cookie Dough
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In a large mixing bowl, using an electric mixer, cream together the softened butter, granulated sugar, and brown sugar for about 1-2 minutes until the mixture is light, fluffy, and well combined. Scrape down the sides of the bowl as needed.
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Next, add in the egg, buttermilk, and vanilla extract. Mix on medium speed until all the wet ingredients are thoroughly combined and the mixture is nice and smooth. Be careful not to overmix at this stage.
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In a separate small bowl, whisk together the all-purpose flour, baking soda, and salt. This ensures the leavening and seasoning are evenly distributed throughout the dry ingredients.
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Gradually add the dry ingredients to the wet mixture. Start by adding about half of the flour mixture, mix until just combined, then add the remaining half. Mix on low speed until no streaks of flour remain. Avoid overmixing, as this can lead to tough cookies.
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The dough will be notably softer and stickier than typical sugar cookie dough – this is normal! Cover the bowl tightly with plastic wrap and let it chill in the refrigerator for at least 1 hour. Chilling is crucial for the dough to firm up, making it easier to handle and preventing excessive spreading during baking.
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Once the dough has chilled, preheat your oven to 400° F (200° C). Line a baking sheet with parchment paper or a silicone baking mat, or lightly spray with non-stick cooking spray. This prevents sticking and ensures even baking.
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Scoop out about 2 tablespoons of cookie dough for each cookie, rolling them gently into balls if desired, and place them onto the prepared baking sheet, leaving about 2 inches between each. Bake for 9-10 minutes, or until the edges are lightly golden and the centers are just set. Do not overbake to maintain softness. Let cool on the cookie sheet for an additional 2-3 minutes before carefully transferring them to a wire cooling rack to cool completely.
Preparing the Fluffy Vanilla Buttercream Frosting
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In a clean mixing bowl, using an electric handheld mixer (or stand mixer with paddle attachment), whip the room temperature butter on medium power for about 3 minutes. Continue until it is wonderfully fluffy and light in color, almost white. This step incorporates air, making the frosting airy.
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Then, add in the vanilla extract, 2 tablespoons of milk, and 1 cup of the powdered sugar. Mix on low speed until combined, then increase to medium and beat for 1 minute. Next, add the remaining cup of powdered sugar and the final tablespoon of milk (if needed for consistency) and continue to mix on medium speed for another 3-4 minutes until the frosting is incredibly smooth, light, and fluffy.
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Once the cookies are completely cooled to room temperature (this is very important to prevent the frosting from melting), generously frost each cookie with about 1 tablespoon of the amazing vanilla buttercream. For a fun, festive touch, feel free to add some colorful sprinkles! Enjoy your perfectly soft and sweet buttermilk sugar cookies!
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Notes
Nutrition
Understanding Buttermilk’s Role in Baking
Buttermilk isn’t just a quirky ingredient; it’s a secret weapon for achieving truly tender baked goods, especially in this buttermilk cookie recipe. The acidity in buttermilk reacts with baking soda to create carbon dioxide, which in turn helps the cookies to rise, resulting in a lighter, fluffier texture. Beyond leavening, buttermilk also adds a unique moisture and subtle tang that enhances the overall flavor profile without being overtly sour. It breaks down gluten, which prevents the cookies from becoming tough, contributing to that desirable melt-in-your-mouth quality.
Buttermilk Substitutions: What to Use If You Don’t Have Any
Don’t have buttermilk on hand? No problem! There are several easy substitutes you can use in this recipe that will still yield great results. While fresh buttermilk is always preferred, these alternatives work well in a pinch:
- Plain Yogurt, Greek Yogurt, or Sour Cream: These dairy products have a similar acidic profile and thickness to buttermilk. To substitute, measure out ¾ cup of plain yogurt, Greek yogurt, or sour cream. Then, add 3 tablespoons of regular milk (whole or 2%) and whisk them together until smooth. This thins it slightly to a consistency closer to buttermilk while maintaining its beneficial acidity.
- Milk + Acid (Homemade Buttermilk): This is perhaps the most common and effective substitute. You can make your own buttermilk at home by combining regular milk with either plain white vinegar or lemon juice. First, measure out 1 tablespoon of either white vinegar or fresh lemon juice into a 1-cup measuring cup. Then, add enough regular milk (dairy or non-dairy) to reach the 1-cup line. Stir the mixture gently and let it sit for about 5-10 minutes. During this time, the milk will curdle slightly and thicken, mimicking the consistency and acidity of true buttermilk. Once it looks slightly clumpy, give it a quick stir and proceed with your recipe as directed.

Can You Freeze Buttermilk Sugar Cookies?
Absolutely! These frosted sugar cookies are excellent candidates for freezing, whether you want to prepare the dough in advance or save baked cookies for later. This makes them perfect for meal prep or for having a delicious treat ready at a moment’s notice.
- Freezing Cookie Dough: I highly recommend freezing the dough if you want freshly baked cookies anytime. Scoop the dough into individual balls (about 2 tablespoons each) and arrange them on a baking sheet lined with parchment paper. Place the entire sheet in the freezer for 1-2 hours, or until the dough balls are solid. Once frozen, transfer the dough balls to an airtight freezer-safe container or a heavy-duty freezer bag. They can be stored in the freezer for up to 2 months. When you’re ready to bake, simply place the frozen dough balls on a prepared cookie sheet and let them sit at room temperature for about 15-20 minutes to thaw slightly before baking as directed in the recipe. You might need to add an extra minute or two to the baking time.
- Freezing Baked Cookies: You can also bake the cookies, let them cool completely, and then freeze them without frosting. Once cooled, place the unfrosted cookies in an airtight container with layers separated by parchment paper to prevent sticking. Freeze for up to 1 month. When ready to enjoy, thaw them at room temperature and then frost them with fresh vanilla buttercream. This is a great option for future entertaining!
Optimal Cooling: The Secret to Perfect Sugar Cookies
The cooling process is often overlooked but is surprisingly important for the final texture and stability of your buttermilk sugar cookies, especially if you plan to frost them. Here’s how to do it right:
- Initial Cooling on Baking Sheet: Cookies are quite delicate and soft immediately after coming out of the oven. If you try to move them too soon, they can break apart. It’s best to leave them on the hot baking sheet for 3-4 minutes. This allows them to set slightly and firm up, making them more stable for transfer.
- Transfer to a Cooling Rack: After the initial setting period, carefully transfer the cookies to a wire cooling rack. This allows air to circulate around all sides of the cookies, ensuring they cool evenly and prevent the bottoms from becoming soggy due from trapped steam.
- Cool Completely Before Frosting: This is a crucial step! For these frosted sugar cookies, it is imperative that they cool completely to room temperature before you apply the vanilla buttercream. If the cookies are even slightly warm, the frosting will melt, slide off, or create an unappealing mess. A fully cooled cookie will hold the frosting beautifully.
While patience is key for frosting, remember that warm cookies are incredibly delicious straight from the oven (before frosting, of course)! A few minutes on a cooling rack, and they are usually cool enough to savor plain.

Tips for Baking Perfect Buttermilk Sugar Cookies
Achieving bakery-quality buttermilk sugar cookies at home is entirely possible with a few simple tips:
- Room Temperature Ingredients: Ensure your butter, egg, and buttermilk are all at room temperature. This allows them to emulsify better, creating a smoother dough and a more consistent final product. Cold ingredients can lead to a lumpy batter and denser cookies.
- Measure Flour Correctly: For accurate baking, use the “spoon and level” method for flour. Fluff the flour in its container, then spoon it into your measuring cup, and finally, level off the excess with a straight edge (like a knife). Don’t scoop directly from the bag, as this can compact the flour and lead to too much flour, resulting in dry, tough cookies.
- Don’t Overmix the Dough: Once you add the dry ingredients to the wet, mix only until just combined. Overmixing develops the gluten in the flour, which can make your cookies chewy and tough instead of wonderfully soft and tender.
- Chill Time is Essential: Do not skip the chilling step! The dough is quite soft, and chilling it allows the butter to firm up and the flavors to meld. This prevents the cookies from spreading too much in the oven, ensuring they maintain their shape and that signature soft texture.
- Don’t Overbake: These cookies are meant to be soft. They should have lightly golden edges and centers that are just set. They might look slightly underdone in the middle when you pull them out, but they will continue to cook slightly on the hot baking sheet. Overbaking will result in dry, crumbly cookies.
- Cool Completely Before Frosting: As mentioned, this is crucial. Warm cookies will melt your beautiful buttercream, turning it into a runny mess. Patience is a virtue here!
- Get Creative with Frosting: While vanilla buttercream is a classic, feel free to experiment with different flavor extracts (almond, lemon, mint) in your frosting. Sprinkles, zest, or even a dusting of cocoa powder can add a fun touch.
Serving and Storage Suggestions
These delightful Buttermilk Sugar Cookies are a cookie lover’s dream come true! They are seriously so soft, flavorful, and incredibly delicious. Serve them as a dessert for family dinners, a special treat for parties, or simply enjoy one (or two!) with a cup of coffee or tea. They make excellent gifts for friends and neighbors, too!
Store frosted cookies in an airtight container at room temperature for up to 3-4 days. If you prefer, or if your kitchen is particularly warm, they can also be stored in the refrigerator for up to a week. Just make sure to bring them back to room temperature before serving for the best flavor and texture. Unfrosted cookies can be stored similarly or frozen as described above.