"M&M Cookie Bars - Packed with colorful M&M'S and mini chocolate chips, these cookie bars are a viral hit and a reader favorite...."
INGREDIENTS
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2 sticks butter (at room temperature)
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1 cup granulated sugar
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1 cup golden brown sugar (firmly packed)
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3 large eggs
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1 1/2 teaspoons pure vanilla extract
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3 cups all-purpose flour
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3/4 teaspoon baking soda
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3/4 teaspoon salt
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1 1/2 cups M&M's (plus more for topping)
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1 cup mini chocolate chips (plus more for topping)