Holidays, Birthdays & Parties · March 16, 2026

St. Patrick’s Day Sugar Cookie Rice Krispie Treats

St. Patrick’s Day Sugar Cookie Rice Krispie Treats topped with colorful Lucky Charms rainbow marshmallows.

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If you love Rice Krispie treats and sugar cookies, this easy dessert mashup is about to become a favorite. These Sugar Cookie Rice Krispie Treats take the classic gooey cereal bar and give it a sweet bakery-style twist with sugar cookie mix and colorful sprinkles.

For a fun St. Patrick’s Day version, add the rainbow marshmallows from Lucky Charms cereal on top. The bright colors make these treats look festive and lucky — perfect for a classroom party, after-school snack, or a simple holiday dessert.

The secret ingredient? Sweetened condensed milk. It makes these treats extra soft, rich, and chewy while the browned butter adds a warm, nutty flavor.

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Ingredients

  • 1/3 cup salted butter
  • 1 (14 oz) can sweetened condensed milk
  • 1 bag Lucky Charm marshmallows
  • 1/2 cup sugar cookie mix
  • 1 (9 oz) box Rice Krispies cereal

Instructions

  1. In a large pot, melt the butter over medium-high heat. Continue cooking until the butter becomes bubbly and begins to turn golden brown. Remove from heat.
  2. Stir in the sweetened condensed milk until combined.
  3. Add the bag of marshmallows and stir until melted and smooth.
  4. Mix in the sugar cookie mix until fully incorporated.
  5. Add the Rice Krispies cereal and stir until evenly coated.
  6. Spread the mixture into a 9×13 baking dish (no need to grease the pan).
  7. Let cool slightly, cut into squares, and serve.

Tips

  • Use low heat once marshmallows are added so the mixture stays soft and gooey.
  • Press the mixture lightly into the pan so the treats stay soft instead of dense.
  • Add sprinkles on top for a fun sugar cookie look.

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