In large saucepan melt butter over low heat. Add marshmallows and stir until completely melted. Stir in food coloring (if desired). Remove from heat.
Add KELLOGG’S RICE KRISPIES cereal. Stir until well coated.
Using butter spatula or wax paper evenly press mixture into 15 x 10 x 1-inch pan coated with cooking spray. Cool slightly. Using heart shaped cookie cutters coated with cooking spray cut into desired shapes.
Heat chocolate in 30 second intervals in microwave until smoothe. Dip Rice Krispies Treat in chocolate and cover with sprinkles/nonpareils
Let chocolate harden and serve.
In microwave-safe bowl heat butter and marshmallows on HIGH for 3 minutes, stirring after 2 minutes. Stir until smooth. Follow steps 2-5 above. Microwave cooking times may vary.