01 -
In a medium bowl, mix melted butter, graham cracker crumbs, brown sugar, powdered sugar, peanut butter, and vanilla until smooth.
02 -
Spread the peanut butter mixture evenly into a 9x13-inch pan.
03 -
Melt chocolate chips in the microwave at 50% power for 1-2 minutes, stirring until smooth.
04 -
Pour melted chocolate over the peanut butter layer and spread evenly with a spatula.
05 -
Refrigerate for 1 hour or until firm. Cut into squares and enjoy.