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1 cup butter, softened
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1 cup sugar
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3/4 cup brown sugar, firmly packed
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2 large eggs
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1 tsp vanilla extract
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2 1/4 cup all purpose flour
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1/3 cup cocoa powder
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1 tsp baking soda
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1 tsp baking powder
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1/2 tsp salt
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1 cup M&Ms
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1 cup semi-sweet chocolate chips
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1 cup chopped nuts (optional)
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