Brownie Cookie Sandwiches with Cookie Dough Buttercream Recipe
Introduction
Brownie cookie sandwiches with cookie dough buttercream combine the rich, fudgy texture of brownies with the soft chewiness of cookies and a creamy, sweet filling. This delightful treat is perfect for satisfying any chocolate craving or impressing guests at your next gathering.

Ingredients
- 1/2 cup unsalted butter, melted
- 1 1/4 cups granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 1/2 cup unsweetened cocoa powder
- 1 cup all-purpose flour
- 1/4 teaspoon salt
- 1/2 teaspoon baking soda
- 1/2 cup semi-sweet chocolate chips
- 1/2 cup unsalted butter, softened (for buttercream)
- 1/4 cup brown sugar (for buttercream)
- 1/2 cup powdered sugar (for buttercream)
- 1 teaspoon vanilla extract (for buttercream)
- 1 tablespoon milk (for buttercream)
- 1/2 cup mini chocolate chips (for buttercream)
Instructions
- Step 1: Preheat oven to 350°F (175°C) and line two baking sheets with parchment paper.
- Step 2: In a large bowl, whisk together the melted butter and granulated sugar until smooth. Add eggs and vanilla extract; whisk until fully combined.
- Step 3: Stir in the cocoa powder, flour, salt, and baking soda until a thick batter forms. Fold in the semi-sweet chocolate chips.
- Step 4: Scoop tablespoon-sized portions of dough onto the baking sheets, spacing them about 2 inches apart. Slightly flatten each ball.
- Step 5: Bake for 10-12 minutes, or until edges are set but centers remain soft. Cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.
- Step 6: To make the cookie dough buttercream, beat the softened butter, brown sugar, and powdered sugar in a large bowl until light and fluffy. Add vanilla extract and milk; mix to combine.
- Step 7: Fold in the mini chocolate chips until evenly distributed.
- Step 8: Once cookies are completely cool, spread a generous amount of buttercream onto the flat side of one cookie. Top with another cookie to form a sandwich. Repeat with remaining cookies.
Tips & Variations
- For extra gooey centers, slightly underbake the brownie cookies and allow residual heat to finish the cooking on the baking sheet.
- Substitute mini chocolate chips in the buttercream with chopped nuts for added crunch.
- Use a piping bag to apply the buttercream evenly and neatly between cookie layers.
- Chill the assembled sandwiches briefly before serving to help the buttercream set.
Storage
Store brownie cookie sandwiches in an airtight container at room temperature for up to 3 days. For longer storage, keep them refrigerated for up to a week. Before serving, let chilled sandwiches sit at room temperature for 10-15 minutes to soften the buttercream slightly.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I make the cookie dough buttercream ahead of time?
Yes, you can prepare the buttercream a day in advance and keep it refrigerated. Bring it to room temperature and re-whip before assembling the sandwiches for the best texture.
What if I don’t have mini chocolate chips?
If mini chocolate chips aren’t available, you can use regular chocolate chips chopped into smaller pieces or omit them altogether for a smoother buttercream.
