​No-Bake Chocolate Peanut Butter Bars

​2 Cups Peanut butter, divided
3/4 c (1 1/2 sticks) butter, softened
2 c. powdered sugar, divided
3 c. graham crackers crumbs
​2 c. (12 oz pk) Semi-sweet chocolate chips divided
 
Grease a 13x9 inch baking pan.
 
Beat 1 3/4 c. peanut butter and butter until creamy.  Gradually beat in 1 c. powdered sugar.  With hands or wooden spoon work in the remaining 1 c. powdered sugar, graham cracker crumbs and 1/2 cup chips.  Press evenly into prepared pan.  Smooth top with spatula.
 
Melt remaining 3/4 c. peanut butter and 1 1/2 cups chips in saucepan over  lowest possible heat.  Stir constantly until smooth.  Spread over crust in  pan.  Refrigerate for at least 1 hour or until chocolate is firm.  Store in the refrigerator.