Peanut Butter Crispy Rice Bars

1/4 cup butter or margarine
1 package (10oz) marshmallows
6 cups chocolate flavored crispy rice cereal
1 cup peanut butter chips
1/2 cup chopped peanuts, optional

Grease 13- X 9-inch pan. In a large saucepan over low heat, melt the marshmallows and butter, stirring occasionally. Remove from heat and stir in remaining ingredients; mix until well coated. Press mixture into the pan, cool, and cut into bars.

Makes about 36 bars.