In a medium saucepan, melt the butter over low heat. Add the marshmallows and stir until completely melted and smooth.
Pour in the rice cereal and stir well until fully coated. Pour in the rice cereal and stir well until fully coated.
While still slightly warm, sprinkle the top with red, white, and blue sprinkles and press them in gently.
Let the mixture cool fully, then use a star-shaped cookie cutter to cut out the treats.
Melt the red and blue candy melts separately, and melt the white chocolate. Drizzle all three colors over the stars for a fun, patriotic finish.