"These cookies are soft, chewy, and chock full of M&M's!..."
INGREDIENTS
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2 1/8 cups flour 1/2 tsp salt 1/2 tsp baking soda 12 Tbsp butter (1 1/2 sticks), melted and cooled slightly 1 cup brown sugar 1/2 cup white sugar 1 large egg 1 large egg yolk 2 tsps vanilla extract 1 12oz bag M&M's, divided