If you’re a fan of rich, chocolatey brownies and peanut butter treats, these Reese’s Pieces Peanut Butter Brownie Cookies are about to become your new favorite! These cookies combine the best parts of brownies and cookies in a single, delicious bite—chewy, fudgy centers, crispy edges, and loaded with Reese’s Pieces and chocolate chips for an irresistible peanut butter-chocolate combo.
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, cocoa powder, baking powder, and salt. Set aside.
In a large bowl, beat the softened butter, granulated sugar, and brown sugar until creamy and smooth.
Mix in the egg and vanilla extract until fully incorporated.
Stir in the creamy peanut butter until the mixture is smooth and creamy.
Gradually add the dry ingredients to the wet mixture, stirring just until everything is combined. Be careful not to overmix.
Fold in the Reese’s Pieces and chocolate chips, distributing them evenly throughout the dough.
Scoop spoonfuls of dough (about 1.5 tablespoons each) onto the prepared baking sheet, spacing them about 2 inches apart. Bake for 8-10 minutes, or until the cookies are set around the edges but still soft in the center.
Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely. Then, enjoy your rich and chewy cookies!