Melt butter in a medium saucepan over low heat.

Add marshmallows, stirring until fully melted and smooth.

Combine cereal: Stir in puffed rice until every grain is coated.

Press into pan: Firmly press mixture into a lined pan (or work surface if hands-on).

Sprinkle topping while still warm—press lightly so they stick.

Cool completely, then cut out stars with a cookie cutter.

Melt candy colors and chocolate separately. Drizzle red, white, and blue over stars for a patriotic pattern.