"Learn how to make nostalgic Cosmic Brownie Cookies - a soft, fudgy chocolate cookie base topped with homemade chocolate buttercream and rainbow chips...."
INGREDIENTS
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½ cup unsalted butter (softened to room temperature)
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¾ cup light brown sugar
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¼ cup granulated white sugar
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1 large egg
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1 teaspoon vanilla extract
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¼ cup unsweetened cocoa powder
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2 cups all purpose flour
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½ teaspoon salt
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½ teaspoon baking powder
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2 ounces unsweetened baking chocolate
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4 Tablespoons butter (softened to room temperature)
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1 teaspoon vanilla extract
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3 cups powdered sugar
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3.5 Tablespoons milk (I used 2%)
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1 pinch salt (optional)
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Rainbow candy chips