No-Bake Peanut Butter and Chocolate Cookies

No-Bake Peanut Butter and Chocolate Cookies
1 cup butter (2 sticks)
1 3/4 cups graham cracker crumbs (about two sleeves)
2 1/3 cups powdered sugar
1 cup creamy peanut butter
2 10 ounce bags of chocolate chips (semi-sweet or milk chocolate)

Melt butter in a mixing bowl.  Add graham cracker crumbs, powdered sugar, and peanut butter, and stir until mixed thoroughly.  Press the peanut butter mixture into a 9" x 13" pan sprayed with non-stick cooking spray.  

Melt chocolate chips and pour over the peanut butter layer, and spread evenly with the back of a spoon. 

Done!

Allow to set for a couple of hours at room themperature (or in refrigerator for no longer than 30 to 40 minutes) before cutting into squares.  Store covered at room temperature.