Combine peanutbutter, butter, graham crackers, and powdered sugar in a large mixing bowl.
Coat or grease a 12" pizza pan (preferably without holes) with cooking spray or butter/oil.
Spread the mixture onto the greased pizza pan.
Melt chocolate chips in the microwave - approximately 1 1/2 min. Stir up the chocolate so it is completely melted, and then spread it on top of the graham cracker mixture on the pan.
Sprinkle with the candy listed or your favorite candy/topping. Chill for 15 min. Serve.
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