1 box powdered sugar
1 tsp. vanilla
2 sticks melted butter
1 1/2 c. peanut butter (crunchy or smooth)
3/4 c. graham crackers, crushed

Mix all ingredients together in large bowl. Press into 13 x 9 inch pan. Melt one 12 ounce bag of chocolate morsels and pour over mixture. Refrigerate until chocolate hardens.