Brownie Cookie Sandwich with Peanut Butter Frosting

Brownie Cookie Sandwich with Peanut Butter Frosting tastes like the classic combo, but better! My recipe is made with a chewy chocolate brownie base layered with peanut butter frosting and a cookie topping.

Save

These brownie cookie sandwiches are like no other dessert you’ve had before! We start with a chewy brownie base, add a layer of creamy peanut butter frosting, then finish with a soft chocolate cookie. Personally, I think this is the best way to eat dessert, but I might be biased 😉

Despite all the decadence and impressive layers, these sandwiches are actually quite easy to make. Each component takes just a few minutes to prepare with no fancy tools needed.

Why You’ll Love This Recipe

This sandwich manages to feel decadent and fun all at once.

Fudgy brownie base: Moist, rich, and perfectly chocolatey.

Soft chocolate cookies: Chewy edges and tender centers make each bite delightful.

Creamy peanut butter frosting: Sweet, smooth, and perfectly balanced with chocolate.

Easy to assemble: You can prep brownies, cookies, and frosting separately, then combine.

Party-ready dessert: Perfect for gatherings, birthdays, or just treating yourself.

Customizable: Add chocolate chips, nuts, or swirl frosting with caramel for variety.

Save

Ingredients

For the Brownies

• 115 g unsalted butter, cut into chunks
• 300 g dark chocolate chips
• 1/4 tsp salt
• 1/3 cup heavy cream
• 1/2 cup dark chocolate chips
• 1/2 tsp baking powder
• 3/4 cup plain flour
• 2 tbsp cocoa powder
• 3/4 tsp vanilla extract
• 3/4 cup caster sugar
• 3 eggs

For the Cookies

• 70 g unsalted butter, softened
• 3/4 tsp vanilla extract
• 1 cup + 2 tbsp caster sugar
• 1/2 tsp salt
• 1 cup plain flour
• 1/2 tsp baking powder
• 2 tbsp cocoa powder
• 1/2 cup dark chocolate chips

For the Peanut Butter Frosting

• 1 cup smooth peanut butter
• 1 cup confectioners’ sugar
• 1/4 cup unsalted butter, softened
• 1 tsp vanilla extract
• 2–3 tbsp heavy cream (optional, for spreadable consistency)

Save

Step-by-Step Instructions

1. Prepare the Brownies

Preheat the oven to 175°C (350°F). Line a square baking pan with parchment paper. Melt the 115 g butter with 300 g chocolate chips in a saucepan over low heat until smooth. Stir in the heavy cream and salt. Remove from heat and let it cool slightly.

2. Mix the Brownie Batter

In a separate bowl, whisk eggs and caster sugar until pale and fluffy. Slowly fold in the melted chocolate mixture. Add flour, cocoa powder, and baking powder. Stir gently until fully combined. Pour into the lined baking pan and smooth the top. Bake for 20–25 minutes until set but still fudgy. Let cool completely.

3. Make the Cookies

Preheat the oven to 175°C (350°F) and line a baking tray with parchment paper. Cream together softened butter, sugar, and vanilla until fluffy. Mix in flour, cocoa powder, baking powder, and salt. Fold in chocolate chips. Scoop onto the tray in 2-tablespoon mounds, flatten slightly, and bake for 10–12 minutes. Let cool before handling.

4. Prepare the Peanut Butter Frosting

In a mixing bowl, beat peanut butter, softened butter, confectioners’ sugar, and vanilla until smooth. If the frosting feels too thick, add 2–3 tablespoons of heavy cream to loosen it to a spreadable consistency.

5. Assemble the Sandwiches

Cut brownies and cookies into similar-sized squares. Spread a generous layer of peanut butter frosting onto a brownie square. Top with a chocolate cookie and press lightly to sandwich. Repeat with remaining pieces.

6. Chill for Stability

Place the assembled sandwiches in the fridge for 20–30 minutes to let the frosting firm up slightly. This makes them easier to handle and enhances flavor.

7. Serve

Arrange sandwiches on a platter. Optionally, drizzle with melted chocolate or sprinkle with chopped peanuts for an extra touch.

Tips & Variations

• Bake brownies until just set to keep them fudgy.
• Swap dark chocolate chips for milk chocolate if you prefer a sweeter profile.
• Use peanut butter with no added sugar for a less sweet frosting.
• Add chopped nuts, mini chocolate chips, or swirl caramel into the frosting for creative variations.

Serving Suggestions

Serve these brownie cookie sandwiches with a glass of cold milk or a cup of coffee. They’re perfect for parties, dessert tables, or afternoon treats.

Pair with fresh berries to cut through the richness or alongside ice cream for a decadent dessert experience. They also make a fun, shareable snack for kids’ lunchboxes.

Frequently Asked Questions

Can I make the brownies or cookies ahead?

Yes, bake and cool separately. Assemble just before serving.

Can I use crunchy peanut butter?

Yes, but creamy gives a smoother spread.

Are these freezer-friendly?

Yes, store in an airtight container for up to 1 month.

Can I make this gluten-free?

Replace flour in brownies and cookies with a 1:1 gluten-free blend.

Can I use a different frosting?

Cream cheese frosting or chocolate ganache works beautifully.

Final Thoughts

Brownie Cookie Sandwich with Peanut Butter Frosting is rich, chewy, and creamy, with every bite delivering chocolate and peanut butter bliss.