LEGO Rice Krispies Treats

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Looking for a fun recipe to make with the kids while they’re at home? These cool and colorful LEGO Rice Krispie Treats are a must for any LEGO fan! 

Prep Time: 20 mins

Cook Time: 10 mins

Resting Time: 1 hr

Total Time: 30 mins

Servings: 9

Calories: 366 kcal


For the Rice Krispie Treats:

  • 6 cups Rice Krispies cereal
  • 10 ounces mini marshmallows
  • 3 tablespoons butter

For the LEGO Topping:

  • 3 egg whites
  • 1 teaspoon vanilla
  • 1/2 teaspoon cream of tarter
  • 3 cups powder sugar
  • gel food coloring red, blue, & green
  • M & Ms red, blue & green


For the Rice Krispies Treats:

  1. Cover bottom and sides of a 9″ x 9″ baking pan with wax paper. Spray with non-stick cooking spray and set aside.
  2. Melt butter in saucepan over medium heat. Once butter is liquid, add mini marshmallows and stir until melted.
  3. Remove pan from heat and mix in Rice Krispies cereal until all cereal is coated in marshmallow mixture.
  4. Scoop Rice Krispie treat “batter” into baking pan. Cover with a sheet of wax paper and press down to form to the shape of the pan.
  5. Chill covered Rice Krispie treats in fridge until fully cooled. (Around 15-30 minutes).

For the LEGO topping:

  1. Combine all ingredients (except the gel colors and M&M’s) in a stand mixer and mix on medium speed until well combined and smooth.
  2. Split icing evenly into 3 small mixing bowls. Add a couple drops of gel food coloring to each bowl (one color per bowl) and stir. Continue adding gel color drop by drop until your icing is the desired shade.

Put it all together:

  1. Cut Rice Krispies treats into small rectangles. Dip the top of each individual treat into one color icing.
  2. Set on a baking sheet and place 6 M&Ms in the same color of the icing on top of each treat to look like a Lego block.
  3. Allow to set for an hour until icing hardens.

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