two10-ounce packagesmarshmallows (or 8 cups mini marshmallows),divided
1cupwhite cake mix,divided
1cuprainbow sprinkles,divided
12cupsRice Krispies,divided
1 to 1½cupswhite frosting
Instructions
You're going to make two batches of Krispie Treats, then you can assemble this dessert.
Make the first batch: Spray a 13x9 inch pan with nonstick spray. In a large pot, melt the butter and add the marshmallows. Stir over low heat until the marshmallows are melted. Remove from heat. Stir in ½ cup cake mix, ½ cup sprinkles and 6 cups Krispies. Stir until coated. Scape into your prepared pan and flatten with clean, lightly buttered hands until you have a nice, even layer. Let cool for a few minutes, then pop out the whole thing onto a large cutting board.
Repeat: Spray the pan and prepare the second batch of treats. Add a few extra sprinkles on top of the 2nd batch. Be sure to press down to flatten and make even.
Assemble: Spread the frosting onto the first layer. Remove the 2nd batch of treats and lay them on top of the frosting. Cut the two-layer treats into 2-inch squares. These should be served the same day, but keep leftovers in a plastic zip bag at room temperature for up to 2 days for munching.