1 (32 oz.) pkg. confectioners sugar
2/3 c. mashed potatoes, chilled
2 tbsp. butter, softened
1 tbsp. vanilla
1 (8 oz.) jar creamy peanut butter

In a large bowl, combine sugar, potatoes, butter and vanilla; mix well. Will be very thick, like play dough. Place between 2 pieces of waxed paper and roll out into a 9 x 14-inch rectangle. Spread peanut butter evenly across. Gently roll up. Wrap in waxed paper; chill. Chill 2 hours; cut into 1/2-inch slices to serve.