01 -
Mix the peanut butter (1 cup), powdered sugar, melted butter, and graham cracker crumbs together in a big bowl until they're fully blended.
02 -
Press the blended mixture evenly into a 9x13-inch dish or go with a 9x9-inch dish if you'd like the bars thicker. No need to grease it.
03 -
Microwave the milk chocolate chips with the extra peanut butter (4 tablespoons) in a microwave-safe bowl. Heat in 30-second bursts, stirring in between, until it’s smooth.
04 -
Once melted, pour the chocolate mixture evenly over the peanut butter layer.
05 -
Pop it in the fridge for at least an hour, or longer, until it's firm and ready to cut into squares.