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Lucky Charms Rice Krispie Treats

Colorful Lucky Charms Rice Krispie Treats with marshmallow and crispy cereal.

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These are the ultimate easy St. Patrick's Day treat, capturing all the nostalgic, crispy-chewy joy of the classic with a playful, colorful twist. A no-bake, one-bowl wonder that turns simple ingredients into a pot of gold at the end of your kitchen rainbow in about 15 minutes of active time.

Ingredients

Scale
  • 6 cups crispy rice cereal (like Rice Krispies)
  • 5 cups Lucky Charms cereal
  • 1 bag (10 oz) mini marshmallows
  • 6 tablespoons unsalted butter
  • 1/2 teaspoon pure vanilla extract
  • 1/4 teaspoon fine sea salt

Instructions

  1. Line a 9x13 inch baking dish with parchment paper, letting it overhang on two sides to create a sling. Lightly grease the parchment and exposed pan sides.
  2. In a very large mixing bowl, combine the crispy rice cereal and Lucky Charms cereal. Before adding the Lucky Charms, scoop out about 1/2 cup of the marshmallow bits and set aside for later.
  3. In a large pot or Dutch oven, melt the butter over low heat. Add the mini marshmallows and the reserved Lucky Charms marshmallows. Stir constantly with a silicone spatula until completely melted, smooth, and glossy (5-7 minutes).
  4. Remove the pot from heat. Immediately stir in the vanilla extract and salt.
  5. Quickly pour the melted marshmallow mixture over the cereals in the large bowl. Gently fold with the spatula until every piece is coated, working efficiently.
  6. Transfer the mixture to the prepared pan. Dampen your hands with water and press the mixture firmly and evenly into the pan. Scatter the reserved marshmallow bits over the top and press them in lightly.
  7. Allow the pan to cool at room temperature for at least 1 hour, or until completely set and firm.
  8. Use the parchment sling to lift the block from the pan onto a cutting board. Use a sharp knife to cut into squares.

Notes

For clean cuts, lightly grease the knife. For a strictly gluten-free version, use certified gluten-free cereals. Do not rush melting the marshmallows; use low heat. Pressing firmly with damp hands is crucial for the right texture. Store in an airtight container at room temperature for up to 3 days.

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