1/4 c. butter
3 c. miniature marshmallows
3 c. Fruity or Cocoa Pebbles cereal
1/3 c. creamy peanut butter (opt.)

Melt butter and peanut butter in pan. Add marshmallows and cereal. Stir until marshmallows begin to melt. Press firmly into greased 8" square pan. Chill 1 hour. Store in cool place.