Spray a 9x13 pan with non-stick cooking spray (make sure it's GF and DF). Melt the "butter" over medium low heat in a saucepan then add the marshmallows and stir until they are melted and blended with the butter. Stir an additional 2 minutes then remove from heat. Add the Koala Krisp and stir until it's evenly mixed with the marshmallow. I like my krispies to be very marshmallowy but if you prefer more cereal then add an additional cup. Spread evenly into the pan, it helps to spray a metal spoon with cooking spray to keep it from sticking to everything.
Allow the krispies to set then use a cookie cutter to cut out star shapes. Sprinkle with colored sugar and decorate with gel.
This would be a great dessert for Valentine's Day, Halloween, St. Patty's Day, etc.