Brownie Cookie Sandwich with Peanut Butter Frosting Recipe
Introduction
This Brownie Cookie Sandwich with Peanut Butter Frosting combines rich, fudgy brownie cookies with a creamy, smooth peanut butter frosting. Perfect for a decadent treat, these sandwiches are easy to make and sure to impress family and friends.

Ingredients
- 1 stick / 1/2 cup / 115g unsalted butter, cut into chunks
- 10 oz / 300g dark chocolate chips (or buttons, melts, or block chocolate cut into chunks)
- 1 cup + 2 tbsp caster sugar
- 3 eggs
- 2 tbsp cocoa powder
- 1 tsp vanilla extract
- 1/2 tsp salt
- 1/2 tsp baking powder
- 3/4 cup plain flour
- 1/2 cup dark chocolate chips
- 1 cup smooth peanut butter
- 1 cup confectioners’ sugar (icing sugar)
- 2.5 oz / 5 tbsp / 70g / 2/3 stick unsalted butter, softened
- 3/4 tsp vanilla extract
- 1/4 tsp salt
- 1/3 cup heavy cream (unwhipped pouring cream)
Instructions
- Step 1: Preheat the oven to 180°C (350°F) and line two baking trays with parchment paper.
- Step 2: Pour 1 inch (2.5 cm) of water into a large saucepan or small pot and bring to a simmer over medium-low heat. Place a bowl over the simmering water and melt the butter and 10 oz (300 g) chocolate chips together, stirring until smooth.
- Step 3: While the chocolate is melting, in a separate bowl beat the eggs, cocoa powder, and caster sugar on high for 3 minutes using an electric mixer or stand mixer with the whisk attachment.
- Step 4: Pour one-third of the melted chocolate into the egg mixture and mix well, then add the remaining melted chocolate and mix again thoroughly.
- Step 5: Add vanilla extract, salt, and baking powder to the mixture and stir until combined.
- Step 6: Fold in the plain flour carefully until just combined, avoiding over-mixing.
- Step 7: Stir in the 1/2 cup of dark chocolate chips.
- Step 8: For large cookies, drop 2 tablespoons of batter onto the lined baking tray, leaving about 2 inches (5 cm) between each. For smaller cookies, use 1 tablespoon per cookie.
- Step 9: Bake large cookies for 15 minutes for a very soft texture or 17 to 20 minutes for firmer cookies. For smaller cookies, bake 10 to 12 minutes for very soft or up to 15 minutes for firmer cookies. They will remain moist either way.
- Step 10: Let the cookies rest on the baking tray for 5 to 10 minutes before transferring them carefully to a cooling rack.
- Step 11: For the peanut butter frosting, place the peanut butter, confectioners’ sugar, softened butter, vanilla extract, and salt in a stand mixer bowl with the paddle attachment. Beat on high for 5 minutes until creamy, scraping the sides as needed.
- Step 12: Add the heavy cream and continue beating for another 2 minutes until the frosting is fluffy. This can also be done with a hand-held mixer but may take slightly longer.
- Step 13: Assemble the sandwiches by spreading peanut butter frosting on one cookie and topping it with another. Repeat with all cookies.
Tips & Variations
- Use high-quality dark chocolate for deeper flavor in the brownie cookies.
- Adjust the baking time to your preferred cookie softness or firmness.
- Add a pinch of espresso powder to the batter to enhance the chocolate flavor.
- For a nut-free option, substitute the peanut butter frosting with vanilla or chocolate buttercream.
Storage
Store the assembled brownie cookie sandwiches in an airtight container at room temperature for up to 3 days, or refrigerate for up to a week. If refrigerated, allow them to come to room temperature before serving for the best texture. The frosting may firm up slightly when chilled.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I make the brownie cookies ahead of time?
Yes, you can bake the cookies a day or two in advance and store them in an airtight container. Assemble the sandwiches just before serving to keep the frosting fresh.
Can I use crunchy peanut butter instead of smooth?
Smooth peanut butter is recommended for a creamy frosting, but you can use crunchy peanut butter if you prefer a bit of texture and extra crunch in the filling.
PrintBrownie Cookie Sandwich with Peanut Butter Frosting Recipe
Indulge in these decadent Brownie Cookie Sandwiches filled with a creamy peanut butter frosting. Combining the fudgy richness of chocolate brownie cookies with a smooth, fluffy peanut butter frosting, this dessert is perfect for satisfying your sweet tooth. Baked to perfection and assembled into delightful sandwich treats, they offer a chewy, moist, and wonderfully chocolaty experience with a nutty twist.
- Prep Time: 20 minutes
- Cook Time: 15 minutes
- Total Time: 50 minutes
- Yield: 12 large cookie sandwiches 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
Brownie Cookies
- 1 stick / 1/2 cup / 115g unsalted butter, cut into chunks
- 10 oz / 300g dark chocolate chips (or buttons, melts, or block chocolate cut into chunks)
- 1 cup + 2 tbsp caster sugar
- 3 eggs
- 2 tbsp cocoa powder
- 1 tsp vanilla extract
- 1/2 tsp salt
- 1/2 tsp baking powder
- 3/4 cup plain flour
- 1/2 cup dark chocolate chips
Peanut Butter Frosting
- 1 cup smooth peanut butter
- 1 cup confectioners’ sugar (icing sugar)
- 2.5 oz / 5 tbsp / 70g / 2/3 stick unsalted butter, softened
- 3/4 tsp vanilla extract
- 1/4 tsp salt
- 1/3 cup heavy cream (unwhipped pouring cream)
Instructions
- Preheat and Prepare Baking Trays: Preheat your oven to 180°C (350°F). Line two baking trays with parchment or baking paper for easy cleanup and to prevent sticking.
- Melt Butter and Chocolate: Pour about 1 inch (2.5 cm) of water into a large saucepan or small pot and bring it to a simmer over medium-low heat. Place a heatproof bowl over the simmering water to create a double boiler. Add the 115g butter and 300g dark chocolate chips to the bowl and stir until melted and smooth.
- Mix Eggs, Sugar, and Cocoa: While the butter and chocolate are melting, beat the 3 eggs, cocoa powder, and caster sugar together in a bowl using an electric mixer on high speed for 3 minutes until well combined and fluffy.
- Combine Chocolate with Egg Mixture: Pour one-third of the melted chocolate mixture into the egg batter and mix well. Then add the remaining melted chocolate and stir again to incorporate fully.
- Add Vanilla, Salt, Baking Powder: Mix in the vanilla extract, salt, and baking powder until everything is evenly combined.
- Fold in Flour and Chocolate Chips: Gradually add the plain flour, mixing just until combined; avoid overmixing to keep the batter tender. Fold in the additional 1/2 cup of dark chocolate chips gently.
- Portion the Cookies: Drop the batter onto the prepared baking trays. For large cookies, spoon 2 tablespoons per cookie, spaced 2 inches (5 cm) apart. For normal-sized cookies, use 1 tablespoon of batter per cookie.
- Bake the Cookies: Bake large cookies for 15 minutes if you prefer them very soft, or 17 to 20 minutes for a firmer texture. Bake smaller cookies for 10 to 12 minutes for soft results, or up to 15 minutes for firmer but still moist cookies.
- Cool the Cookies: Let the baked cookies rest on the trays for 5 to 10 minutes, then carefully transfer them to a cooling rack to cool completely.
- Prepare Peanut Butter Frosting: In a stand mixer bowl fitted with the paddle attachment, add the peanut butter, confectioners’ sugar, softened butter, vanilla extract, and salt. Beat on high for 5 minutes until creamy, scraping down the sides as needed. Pour in the heavy cream and continue beating for another 2 minutes until the frosting is fluffy.
- Assemble the Sandwiches: Spread a generous amount of peanut butter frosting onto the bottom of one cookie, then sandwich it with another cookie. Repeat this process with all remaining cookies to form sandwiches.
Notes
- For softer cookies, bake for the shorter recommended time; for firmer cookies, bake longer but still moist.
- Use good quality dark chocolate for the best flavor in the brownie cookies.
- The frosting can be made with a hand mixer if you don’t have a stand mixer, but it may take a few extra minutes to achieve fluffiness.
- You can refrigerate the assembled cookie sandwiches for firmer frosting or keep them at room temperature for a softer texture.
- Ensure the cookies are fully cooled before frosting to prevent melting the frosting.
Keywords: brownie cookie sandwiches, peanut butter frosting, chocolate cookies, dessert sandwich, easy baking, chocolate peanut butter treat

