INGREDIENTS
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2 sticks (equals 1 cup or 16 tbsp. or 8 oz.) unsalted butter, room temperature (Must be full fat! Don't try to substitute here)
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1 1/4 cup granulated sugar
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2/3 cup light brown sugar, tightly packed
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1 egg
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1/2 tsp. vanilla extract
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1 1/2 cups all purpose flour
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1/2 tsp. baking powder
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1/2 tsp. baking soda
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1 1/2 tsp. kosher salt
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3 cups Cornflake Crunch
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2/3 cup mini chocolate chips
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1 1/4 cup mini marshmallows