In large saucepan melt chocolate morsels and butter over low heat. Add marshmallows and stir until completely melted. Remove from heat.
Add Rice Krispies cereal. Stir until well coated.
Using buttered spatula or wax paper evenly press mixture into 15 x 10 x 1-inch pan coated with cooking spray. Cool slightly.
Using large circle cookie cutter, very small circle cookie cutter and 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.
<b>Microwave instructions</b> In microwave-safe bowl heat chocolate morsels, butter and marshmallows on high for 3 minutes, stirring after 2 minutes. Stir until smooth. Follow steps 2, 3, and 4 above. Microwave cooking times may vary.
This Rice Krispies recipe is reprinted with permission from <a href="http://www.weldonowen.com/food-drink/baking-desserts/rice-krispies-treats-cookbook">The Rice Krispies Treats Cookbook</a> by Norman Kolpas and published by Weldon Owen.