Coat the bottom and sides of an 8x8 inch baking pan with non-stick cooking spray.
Melt 3 tbs butter in a large saucepan.
Add 4 cups mini marshmallows and stir constantly until melted.
Remove from heat.
Add 3 tbs of the lemonade powder to your melted marshmallows and stir to combine.
Add 6 cups Rice Krispies cereal to the marshmallow mixture and stir until all the cereal is coated.
Turn that mixture out into your baking pan and use a piece of wax paper to press the cereal mixture down firmly.
Allow your treats to cool completely.
Place your marshmallow creme into the ziploc bag and cup a very small hole from one corner of the bag.
Pipe the marshmallow creme onto your treats as shown.
Sprinkle with yellow lemon Nerds candy.