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Golden brown butter Lucky Charms treats with colorful marshmallows on a plate.

Brown Butter Lucky Charms Treats

These whimsical yet sophisticated treats transform a childhood favorite into a gourmet snack. Brown butter adds a rich, nutty depth that perfectly complements the sweet, colorful marshmallows of Lucky Charms cereal, all bound together in a chewy, buttery bar. It's a simple upgrade that feels like a revelation.
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Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes
Servings: 12
Course: Dessert, Snack
Cuisine: American
Calories: 250
Ingredients Equipment Method Notes

Ingredients
  

  • 1 teaspoon pure vanilla extract
  • 1/2 teaspoon fine sea salt

Equipment

  • 9x13 inch baking dish
  • Parchment paper
  • Large heavy-bottomed pot or Dutch oven
  • Wooden spoon or heatproof spatula
  • Measuring cups and spoons
  • Sharp knife
  • Cutting board

Method
 

  1. Prepare the pan: Lightly grease a 9x13 inch baking dish with butter or line it with parchment paper, leaving an overhang on the sides. Set aside.
  2. Separate cereal marshmallows: Measure out the Lucky Charms cereal. Pick out about 1 cup of the marshmallows from the cereal and set them aside separately.
  3. Brown the butter: Melt the unsalted butter in a large, heavy-bottomed pot over medium heat. Cook, swirling occasionally, until the butter foams, crackles, and then forms golden brown specks at the bottom and smells nutty. Immediately remove from heat.
  4. Flavor the butter: Off the heat, stir the vanilla extract and fine sea salt into the hot brown butter.
  5. Melt the marshmallows: Add the entire bag of mini marshmallows to the pot. Return the pot to low heat. Stir constantly until the marshmallows are completely melted and smooth into a creamy mixture. Remove from heat immediately.
  6. Combine with cereal: Quickly add the Lucky Charms cereal oat pieces (not the reserved marshmallows) to the pot. Stir until every piece is thoroughly coated.
  7. Fold in reserved marshmallows: Gently fold in the 1 cup of reserved cereal marshmallows, trying to distribute them without crushing or melting them further.
  8. Press into pan: Transfer the mixture to the prepared pan. Use a piece of parchment paper or lightly buttered hands to press it into an even, firm layer without crushing it.
  9. Set at room temperature: Let the pan sit undisturbed at room temperature for at least 2 hours, or until completely cool and set.
  10. Slice and serve: Use the parchment overhang to lift the slab from the pan. Place on a cutting board and use a sharp knife (wiped with a damp cloth between cuts for cleanliness) to slice into bars or squares.

Notes

Watch the butter closely to prevent burning. Use low heat when melting marshmallows to avoid seizing. Lightly grease your spatula and hands to prevent sticking. Store in an airtight container at room temperature for up to 5 days; do not refrigerate. Variations: Add 1/2 cup toasted nuts, fold in 1 cup mini chocolate chips, or drizzle with melted chocolate after cooling. For salted butter, omit the added fine sea salt.