1 (10 oz.) pkg. regular marshmallows or 4 c. miniature marshmallows
1/4 c. butter
1/2 c. peanut butter
1 (10 oz.) box (7 1/2 c.) Frosted Flakes or Rice Krispies
1/2 c. peanuts (optional)
1/2 c. coconut (optional)
rainbow jimmies (optional topping)

In 4 quart microwave bowl, melt marshmallows and butter on high for 3 minutes, stirring halfway thorough cooking. Stir in peanut butter until smooth. Add cereal, stirring until well coated. Using buttered spatula or waxed paper, press mixture into lightly greased 13 x 9 x 2 pan or dish. Sprinkle, if desired. Cut into bite-size squares.