…microwave necessary.

1 pkg chocolate chips

2 1/2 cups graham cracker crumbs (2 1/2 sleeves–if the box is the classic 3-sleeve style)

1 1/2 cups powdered sugar

1 cup melted butter

1 1/2 cups PB

Combine butter & PB to melt in microwave.  Crush graham crackers, or be smart & buy a box of crumbs.  Graham cracker crumbs + powdered sugar + butter/PB.  Spread in 9×13 pan.  Melt chocolate chips in microwave (short bursts w/lots of mixing after initial 30 seconds).  Spread over top of PB crumb mixture.  Refrigerate for at least an hour, then cut into square.