1-First Step: Prep Your Workspace and Ingredients Grease a 9×13 inch baking pan with nonstick spray or butter and set aside. Measure out 9 tablespoons butter, 12 cups marshmallows, and 9 cups Rice Krispies cereal. Also have your red and blue food coloring and optional sprinkles ready.

2-Second Step: Divide Butter and Marshmallows Separate the butter and marshmallows into three equal portions about 3 tablespoons butter and 4-5 cups marshmallows each. This division allows you to create distinct red, white, and blue layers for your rice krispies.

3-Third Step: Make the Red Layer In a microwave-safe bowl, melt the first portion of butter and marshmallows (about 1 to 1.5 minutes) until smooth. Stir in red food coloring until evenly distributed. Fold in 3 cups of Rice Krispies cereal carefully, then press this red mixture evenly into the bottom of your greased pan using a greased spatula or wax paper to avoid sticking.

4-Fourth Step: Make the White Layer Repeat the melting and mixing process with the second butter and marshmallows portion, but do not add any food coloring so the layer remains white. Fold in another 3 cups of cereal and gently press it on top of the red layer, being careful not to mix the two layers.

5-Fifth Step: Make the Blue Layer For the final layer, melt the remaining butter and marshmallows and add blue food coloring (start with 2 drops and adjust for preferred shade). Fold in the last 3 cups of Rice Krispies cereal and press this mixture evenly on top of the white layer.

6-Sixth Step: Add Toppings Immediately sprinkle patriotic sprinkles and/or red, white, and blue candies over the blue layer, gently pressing them onto the surface to secure.

7-Final Step: Let Set and Serve Cover the pan and let the layered rice krispies set at room temperature for about 4 hours or until firm. Use a buttered or plastic knife to cut into squares, or employ star-shaped cookie cutters for festive shapes. Serve and enjoy your vibrant, no-bake treat! For dietary adaptations, use vegan marshmallows or gluten-free rice cereal throughout prepping and mixing.