INGREDIENTS
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3/4 c. unsalted butter, softened
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1/2 c. sugar
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1/2 c. brown sugar
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1/4 c. milk
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1 large egg
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1/2 tsp. pure vanilla extract
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2 1/2 c. all-purpose flour
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1 tsp. baking soda
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1/4 c. cocoa
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1/4 tsp. kosher salt
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10 oz. mini marshmallows
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1/3 c. semi-sweet chocolate chips
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1 c. chocolate-covered pretzels
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Red, green, and white nonpareils