Peanut Butter Cup Blondies

Preheat oven to 350°F and spray a 13 x 9-inch baking dish with nonstick spray. Whisk together flour, sugar, baking powder, and salt in a medium bowl.

Whisk together peanut butter, melted butter, milk, vanilla, and eggs in a medium bowl; add to flour mixture and stir just until combined. Roughly chop up half of the mini peanut butter cups, then stir into batter.

Spread batter evenly into prepared baking dish; smooth top with an offset spatula. Scatter remaining mini peanut butter cups over batter. Bake for 18 minutes, or until edges are golden and a toothpick inserted in the center comes out with a few crumbs attached. Remove from oven to cool completely in a pan on a wire rack; cut into bars with a serrated knife.

Store in an airtight container at room temperature up to 3 days or wrap individually in waxed paper and freeze for up to 1 month.