1 (18 oz.) jar peanut butter
1 c. butter
6 3/4 c. powdered sugar
1 (12 oz.) pkg. chocolate chips

In a large saucepan, melt butter and then mix in peanut butter. Remove from heat and add powdered sugar until mixture is crumbly. All of powdered sugar may not be needed. Press mixture into 9 x 13 x 2 inch pan.

Melt chips over low heat and pour over peanut butter mixture. Place in refrigerator and chill until chocolate is set; then cut into squares and keep in a cool place.