1. In a large saucepan, melt chocolate morsels and butter over low heat. Add marshmallows and stir until completely melted.
2. Add Kellogg's Rice Krispies® cereal. Stir until well coated.
3. Using buttered spatula or wax paper, press mixture evenly into a 15 x 10 x 1-inch pan coated with cooking spray. Cool slightly.
4. Using a large circle cookie cutter, a very small circle cookie cutter and a rabbit head cookie cutter coated with cooking spray, cut cereal mixture into shapes. For each rabbit, attach one rabbit head shape to top of large circle shape with frosting. Attach one small circle for tail to each. Decorate with frosting and/or candies. Best if served the same day.