1 (7 oz.) jar marshmallow creme
1 (6 oz.) pkg. (1 c.) semi-sweet chocolate chips
2-3 tbsp. butter

Melt the above together on low heat. Stir in 5 cups Captain Krunch peanut butter cereal, 1/2 cup raisins (if desired). Coat well and press in 8-inch square pan. Cool and cut.