INGREDIENTS
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1 cup butter, softened
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1 1/2 cups firmly packed light brown sugar
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1 egg
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2 cups flour
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3/4 teaspoon baking soda
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3/4 teaspoon cinnamon, divided
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2 cups quick oats
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1 cup chopped walnuts
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2 cups semi-sweet chocolate chips, divided
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1 (14 ounce) sweetened condensed milk
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1 tablespoon instant coffee