The giant, delightfully indulgent cookies at Costco are legendary. That’s why, when I heard there was a new cookie-meets-Rice Krispies treat hybrid in the baked goods section, I ran to my local store to check it out. They come in a package of 24 large cookies for $9.99. Luckily I found some, because it’s been hard to find the marshmallow crispy cookies on store shelves since they went viral online. Let me tell you that from the first bite, they were so incredible, I was instantly inspired to create my own copycat Costco marshmallow crispy cookies at home.
How do the Costco Marshmallow Crispy Cookies taste?
The base of Costco marshmallow crispy cookies is a sugar cookie made with brown butter, which is is filled with crisp rice cereal for texture. There are melted marshmallows on top of the cookies that transform them into a dreamy, gooey dessert. The cereal and marshmallows in these cookies provide the nostalgic flavor and texture of a Rice Krispies bar, but for me, it was the genius twist of using brown butter that took the cookies to a whole new level. The delightfully nutty flavor from the brown butter elevated these cookies into a sophisticated treat.
How to Make Copycat Costco Marshmallow Crispy Cookies
It took me a few tries to get this copycat recipe just right. The key to success was browning only a portion of the butter used in the dough as well as chilling it before baking. This prevents the cookies from spreading too much.
Ingredients
- 1 cup unsalted butter, softened and divided
- 1 cup firmly packed brown sugar
- 1/2 cup granulated sugar
- 1 egg
- 1 egg yolk
- 1-1/2 teaspoons vanilla extract
- 2-3/4 cups all-purpose flour
- 1 teaspoon salt
- 1 teaspoon baking powder
- 1/2 teaspoon baking soda
- 2 cups crisp rice cereal
- 1 cup mini marshmallows
Directions
Step 1: Brown the butter
Place 1/2 cup (one stick) of the butter in a medium saucepan over medium heat. Gently stir until the butter begins to brown and has a nutty aroma. Remove the pan from the heat and cool the butter completely.
Step 2: Make the dough
In a large mixing bowl, cream together the remaining stick of butter, the cooled browned butter, brown sugar and granulated sugar until they’re light and fluffy. Add the egg, egg yolk and vanilla extract until they’re well comb