There's nothing quite like the delightful fusion of textures and flavors when you take a bite of a Brownie Cookie Sandwich with Cookie Dough Buttercream. Picture this: the rich, fudgy allure of a brownie cookie is perfectly paired with a swirl of airy, cookie dough-infused buttercream, creating an irresistible treat that’ll have your taste buds dancing with joy.
I discovered this decadent recipe during a weekend baking marathon, yearning for something that straddled the line between a cookie and a brownie. These sandwiches turned out to be the ultimate solution—perfect for when you want to impress friends or simply indulge in a sweet escape from the ordinary. Whether you're serving them chilled from the fridge or at room temperature, these treats are guaranteed to evoke ooohs and aaahs. They’re dangerously delicious and endlessly versatile; feel free to experiment with different fillings or toppings to make them truly your own. Grab your apron, and let’s dive into this sweet adventure!
Why are Brownie Cookie Sandwiches with Cookie Dough Buttercream irresistible?
Decadent, two-in-one treat: You'll love how these sandwiches combine the best of both worlds—rich brownie cookies and luscious cookie dough buttercream.
Customizable delight: Experiment with various fills like vanilla or marshmallow to suit your taste.
Quick preparation: With straightforward steps, they come together in no time—perfect for busy bakers!
Crowd-pleaser: These sandwiches are sure to wow at any gathering, making them ideal for parties and potlucks.
A year-round favorite: Whether it’s summer or winter, these treats can be enjoyed chilled or at room temperature, making them versatile for any season. Indulge in these heavenly delights today and for more cookie goodness, check out our edible cookie dough recipe!
Brownie Cookie Sandwiches Ingredients
For the Brownie Cookies
• Unsalted butter – for a rich and fudgy texture that helps bind all the ingredients together.
• Granulated sugar – sweetens the brownies perfectly to create that tempting flavor.
• Brown sugar – adds moisture and a deep caramel undertone to the cookies.
• Eggs – they provide structure and hold the ingredients together for a chewy bite.
• All-purpose flour – essential for the body's structure; don’t forget to preheat treatment!
• Cocoa powder – gives that bold chocolate flavor and enhances the brownie experience.
• Baking powder – helps the cookies rise without losing that dense, fudgy character.
• Salt – enhances the sweetness and balances the flavors, making the chocolate truly shine.
• Chocolate chips – for an extra burst of chocolatey goodness in every bite.
For the Cookie Dough Buttercream
• Unsalted butter – makes the frosting creamy, adding to the dreamy texture.
• Powdered sugar – sweetens the buttercream and helps achieve that perfect spreadable consistency.
• Heat-treated flour – crucial for safety; always heat treat to avoid raw flour bacteria.
• Vanilla extract – adds warmth and flavor depth to the buttercream.
• Milk – for a silky smooth consistency; adjust according to desired thickness.
You'll find full measurements in the recipe card below.
How to Make Brownie Cookie Sandwiches
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Heat treat the flour: Begin by spreading ½ cup extra flour onto a clean, dry baking sheet. Bake it at 300°F (150°C) for 5-8 minutes, stirring every 2 minutes, until it reaches 165°F (74°C). Allow it to cool completely before using.
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Cream the butters: In a mixing bowl, combine unsalted butter, granulated sugar, and brown sugar. Beat them together until light and fluffy, being careful not to over-cream to avoid flat cookies.
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Add the eggs: Crack in the eggs, one at a time, mixing well after each addition. This helps ensure a well-combined, rich texture.
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Mix dry ingredients: In a separate bowl, whisk together the all-purpose flour, cocoa powder, baking powder, and salt. Gradually add this mixture to the wet ingredients, mixing just until combined to create that fudgy cookie batter.
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Fold in chocolate chips: Gently fold in the chocolate chips, ensuring they are evenly distributed throughout the dough for chocolatey goodness in every bite.
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Scoop and bake: Using a cookie scoop, portion out dough balls weighing between 0.7-0.8 ounces onto a lined baking sheet. Bake at 350°F (175°C) for about 10-12 minutes, until the edges are set but the centers remain soft and fudgy.
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Cool the cookies: Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. This step is essential for achieving the perfect texture.
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Prepare the buttercream: While the cookies cool, mix the softened unsalted butter and powdered sugar until creamy. Add heat-treated flour, vanilla extract, and milk, mixing until smooth and spreadable. Adjust milk for desired consistency.
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Assemble sandwiches: Take a cooled brownie cookie and spread a generous layer of cookie dough buttercream on the flat side. Top with another cookie, pressing gently to create a lovely sandwich.
Optional: Drizzle melted chocolate on top for an extra touch of decadence!
Exact quantities are listed in the recipe card below.
Brownie Cookie Sandwiches with Cookie Dough Buttercream Variations
Feel free to let your creativity flow and personalize these delightful sandwiches to your heart's content.
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Marshmallow Magic: Swap cookie dough buttercream for fluffy marshmallow frosting to add an airy twist that enhances the sweetness.
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Nutty Touch: Add chopped nuts, like pecans or walnuts, to the brownie cookie dough for a delectable crunch that contrasts beautifully with the softness.
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Flavor Burst: Experiment with various extracts like almond or hazelnut instead of vanilla in the buttercream for unique taste profiles.
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Fruity Delight: Incorporate fruit fillings such as strawberry or raspberry jam between the cookies for a burst of fruitiness that balances the richness.
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Chocolate Explosion: Mix in mini chocolate chips or a drizzle of chocolate ganache on top for an extra layer of chocolatey goodness that takes it over the top.
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Spicy Kick: Add a pinch of cayenne pepper or chili powder to the brownie mix for a surprising sweet-heat twist that elevates the taste experience.
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Dark Chocolate Swap: Use dark chocolate cocoa powder instead of regular for a more intense chocolate flavor that satisfies the deepest cravings.
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Vegan Option: Substitute butter and eggs for plant-based alternatives and use a vegan chocolate chip cookie recipe for a delicious vegan-friendly treat.
With these variations, your Brownie Cookie Sandwiches will be just as unique as the special moments you create while making them! Enjoy the adventure!
What to Serve with Brownie Cookie Sandwiches with Cookie Dough Buttercream?
Transform your delightful dessert into a full experience that ties together flavors and textures.
- Fresh Berries: The tartness of strawberries or raspberries cuts through the sweetness, creating a balanced dessert.
- Vanilla Ice Cream: Creamy and cold, it adds a delightful contrast to the richness of the brownies, making each bite heavenly.
- Chocolate Sauce: A drizzle amplifies the chocolate flavor, enhancing the indulgence of the cookie sandwiches.
- Whipped Cream: Light and airy, it complements the rich brownie texture beautifully, making each bite lighter and more velvety.
- Coffee or Espresso: The bitterness of coffee acts as the perfect foil to the sweetness of the sandwiches, providing a sophisticated pairing.
- Mint Sprigs: Fresh mint garnished on the side brings a refreshing hint, making the dessert feel vibrant and festive.
- Milkshake: An ice-cold milkshake offers a nostalgic and fun twist that's mouth-wateringly delightful when paired with your treats.
- Fruit Salad: A mix of seasonal fruits adds a refreshing element, balancing the richness while giving a refreshing crunch.
Expert Tips for Brownie Cookie Sandwiches
Heat Treat Flour: Always heat treat flour for the buttercream to eliminate bacteria, ensuring a safe and delicious treat.
Don’t Over-Cream: Avoid flat cookies by creaming the butter and sugar just until light and fluffy—too much air can cause them to spread.
Uniform Sizes: Weigh dough balls (0.7-0.8 ounces) for consistency; evenly sized cookies bake at the same rate, ensuring perfect results every time.
Chill for Flavor: For intensified flavors, chill the assembled sandwiches in the fridge before serving; this allows the buttercream to firm up beautifully.
Experiment with Fillings: Feel free to switch up the cookie dough buttercream with varying flavors like marshmallow, vanilla, or even a fruity twist for a personal touch!
Storage Tips for Brownie Cookie Sandwiches with Cookie Dough Buttercream
Room Temperature: Store brownie cookie sandwiches tightly covered at room temperature for up to 3 days to maintain freshness and flavor.
Fridge: For a chilled treat, keep the sandwiches in the fridge in an airtight container; they’ll stay delicious for up to a week.
Freezer: Freeze the sandwiches for up to 2 months, wrapping them individually in plastic wrap or placing them in a covered container to prevent freezer burn.
Reheating: If you prefer them warmed, microwave each sandwich for 10-15 seconds for that fresh-out-of-the-oven taste!
Brownie Cookie Sandwiches with Cookie Dough Buttercream Recipe FAQs
What is it called when you mix a brownie and a cookie?
It's known as a "brownie cookie" or sometimes referred to as a "brookie," which is a delightful mash-up of both treats that combines the chewy, fudgy texture of a brownie with the crisp edges of a cookie. This scrumptious fusion creates the best of both worlds!
How to turn Pillsbury brownie mix into cookies?
To transform Pillsbury brownie mix into cookies, start by preheating your oven to 350°F (175°C) and lining your baking sheets with parchment paper. Combine the brownie mix with eggs, oil, and any other ingredients specified on the box. For thicker cookies, use less oil and add extra flour to thicken the batter. Scoop small balls of dough onto the baking sheets, spacing them apart, and bake for about 10-12 minutes. Allow them to cool before enjoying a chewy cookie experience!
What to fill cookie sandwiches with?
You can fill cookie sandwiches with a variety of delicious fillings! Popular options include classic buttercream frosting, cream cheese frosting, or even whipped cream. If you're feeling adventurous, try flavored fillings like chocolate ganache, peanut butter frosting, or even a fruity jam for a unique twist. The choice truly is yours, and the more variations, the merrier!
How to store Brownie Cookie Sandwiches with Cookie Dough Buttercream?
Store your brownie cookie sandwiches tightly covered at room temperature for up to 3 days to keep them soft and fresh. If you want to enjoy them chilled, place them in an airtight container in the fridge, and they'll stay tasty for up to a week. For longer storage, you can freeze the sandwiches for up to 2 months. Just wrap each sandwich individually in plastic wrap or place them in a covered container to avoid freezer burn. When ready to eat, simply let them thaw or microwave briefly for that fresh-baked taste!
What are cookie dough brownies called?
Cookie dough brownies are often referred to as "brownie batter cookies" or "cookie dough brownies." This delightful dessert usually consists of a brownie base topped with cookie dough, creating an indulgent treat that combines both flavors irresistibly!
Why are they not called brownies anymore?
Sometimes these treats may be called "brownie cookies" or "brookies" to highlight their unique texture and form. Their decadent combination of brownie and cookie attributes makes them distinct from typical brownies, hence the playful renaming to reflect their hybrid nature!

Indulgent Brownie Cookie Sandwiches with Cookie Dough Buttercream
Ingredients
Method
- Heat treat the flour: Begin by spreading ½ cup extra flour onto a clean, dry baking sheet. Bake it at 300°F (150°C) for 5-8 minutes, stirring every 2 minutes, until it reaches 165°F (74°C). Allow it to cool completely before using.
- Cream the butters: In a mixing bowl, combine unsalted butter, granulated sugar, and brown sugar. Beat them together until light and fluffy, being careful not to over-cream to avoid flat cookies.
- Add the eggs: Crack in the eggs, one at a time, mixing well after each addition.
- Mix dry ingredients: In a separate bowl, whisk together the all-purpose flour, cocoa powder, baking powder, and salt. Gradually add this mixture to the wet ingredients, mixing just until combined.
- Fold in chocolate chips: Gently fold in the chocolate chips.
- Scoop and bake: Using a cookie scoop, portion out dough balls weighing between 0.7-0.8 ounces onto a lined baking sheet. Bake at 350°F (175°C) for about 10-12 minutes.
- Cool the cookies: Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
- Prepare the buttercream: While the cookies cool, mix the softened unsalted butter and powdered sugar until creamy. Add heat-treated flour, vanilla extract, and milk, mixing until smooth and spreadable.
- Assemble sandwiches: Take a cooled brownie cookie and spread a generous layer of cookie dough buttercream on the flat side. Top with another cookie.
Nutrition
Notes
- Heat Treat Flour: Always heat treat flour for the buttercream.
- Don’t Over-Cream: Avoid flat cookies by creaming just until light and fluffy.
- Uniform Sizes: Weigh dough balls (0.7-0.8 ounces) for consistency.
- Chill for Flavor: For intensified flavors, chill the assembled sandwiches in the fridge.
- Experiment with Fillings: Switch up the cookie dough buttercream with varying flavors.