Melt 3 tbs butter in a large saucepan. Add 4 cups mini marshmallows and stir constantly until melted.
Remove from heat.
Add your 3 oz box of Strawberry Jell-O and stir until it has melted into your marshmallow mixture.
Add 6 cups Rice Krispies cereal to the marshmallow mixture and stir until all the cereal is coated.
Turn that mixture on top of your chocolate layer and use a piece of wax paper to press the cereal mixture down firmly.
Allow your treats to cool completely before slicing and serving. Enjoy!