Add marshmallows and stir until completely melted.
Remove from heat.
Add rice krispies cereal. Stir until well coated.
Using buttered spatula or wax paper, evenly press mixture into a 13 x 9 x 2-inch pan coated with cooking spray. Sprinkle with patriotic star mini shapes, lightly press down. Cool.
Cut out using star shaped cookie cutters.
With red sparkle gel, outline stars around the edges.