INGREDIENTS
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1 (18 1/4 ounce) dark chocolate cake mix
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1/2 cup butter, room temperature
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1/3 cup dark brown sugar (if you like a less sweeter taste use 1/4 cup)
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1/4 cup water
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2 large eggs
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1 teaspoon vanilla
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3/4 cup chopped walnuts or 3/4 cup chocolate chips, or 1/2 cup of each
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frosting (your choice – optional)