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Marshmallow Crispy Cookies (Costco Copycat)

Marshmallow Crispy Cookies (Costco Copycat)

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Indulge in the delightful taste of Marshmallow Crispy Cookies (Costco Copycat), where crispy meets chewy in a heavenly treat. This easy-to-make recipe features brown butter that enhances the caramel flavor, paired with gooey mini marshmallows and crunchy rice krispies. Perfect for any occasion—be it a family gathering, bake sale, or simply treating yourself—these cookies are bound to impress. With no chilling required, you can whip up a fresh batch in under an hour. Enjoy them alongside milk, coffee, or as part of a dessert sandwich filled with ice cream for an extra special treat.

Ingredients

Scale
  • ½ cup salted butter
  • ¾ cup brown sugar
  • ½ cup granulated sugar
  • 1 large egg (room temperature)
  • 1 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1½ cups rice krispie cereal
  • ⅔ cup mini marshmallows
  • Flaked salt (for topping)

Instructions

  1. Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
  2. In a medium saucepan, melt the butter over medium heat until golden brown and nutty in aroma; cool slightly.
  3. In a mixing bowl, combine the browned butter with both sugars, add the egg and vanilla, and mix until smooth.
  4. Gradually mix in flour, salt, and baking soda until just combined.
  5. Gently fold in rice krispies and mini marshmallows.
  6. Scoop dough onto the prepared baking sheet, spacing cookies apart.
  7. Bake for 10-13 minutes until edges are lightly golden; sprinkle with flaked salt after baking.

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