1/4 c. butter (1/2 stick)
4 c. miniature marshmallows
6 c. Rice Krispies cereal
1 1/4 c. chocolate chips
1/4 c. chopped nuts, optional
1/4 c. M&M'S®, chopped

Place butter in large saucepan and melt over low heat. Add marshmallows and stir until completely melted. Gradually add cereal, stirring until evenly coated. Pour cereal mixture onto buttered 12 inch pizza pan. Spread mixture to the edges with buttered fingers.

Melt chocolate chips over low heat. Spread over cereal mixture, leaving a 1 inch border uncovered. Sprinkle with chopped M&M'S® and nuts. Cut in pizza slices.