Melt butter in a pot, then add marshmallows and melt. The large marshmallows should not be melted all the way, so there will be little chunks. Mix in rice crispies and spread into a buttered pan.
Delicious variation: Reduce butter by ½ stick and add 1 cup peanut butter. Spread a thin layer of melted chocolate chips on top. Totally scrumptious!
