# Components:
→ Dry Ingredients
01 - 1 cup all-purpose flour
02 - 1 cup unsweetened cocoa powder
03 - 1/2 teaspoon baking powder
04 - 1/2 teaspoon salt
→ Wet Ingredients
05 - 1 cup unsalted butter, melted
06 - 2 cups granulated sugar
07 - 4 large eggs
08 - 2 teaspoons vanilla extract
→ Mix-ins and Filling
09 - 1 cup semi-sweet chocolate chips
10 - 16 mini peanut butter cups or 8 standard peanut butter cups, halved
# Method:
01 - Preheat oven to 350°F. Line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - In a medium bowl, whisk together flour, cocoa powder, baking powder, and salt.
03 - In a large bowl, combine melted butter and sugar, whisking until glossy.
04 - Beat in eggs one at a time, mixing well after each addition. Stir in vanilla extract.
05 - Gradually fold the dry ingredients into the wet mixture until just combined. Do not overmix.
06 - Gently fold in chocolate chips.
07 - Spread half of the brownie batter evenly into the prepared pan.
08 - Arrange peanut butter cups evenly over the batter.
09 - Spoon remaining batter over the peanut butter cups, smoothing the top with a spatula to cover completely.
10 - Bake for 28 to 32 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
11 - Allow to cool completely in the pan before lifting out and slicing into squares.