INGREDIENTS
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1 c. (16 T.) butter, at room temperature
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1 c. brown sugar
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1/3 c. granulated sugar
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2 large eggs
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1 T. vanilla extract
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2 ½ c. all-purpose flour
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1/2 c. unsweetened cocoa powder
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1 T. cornstarch
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1 ½ tsp. baking soda
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1 tsp. kosher salt
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1/2 c. semisweet mini chocolate chips
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1/2 c. marshmallow bits
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About 48-96 semisweet chocolate disks
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24 marshmallow stackers