"This family friendly coffee cake combines sour cream and butter for a moist rich decadent cake. The easy six ingredient streusel filling takes this treat over the top...."
INGREDIENTS
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1 cup flour
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1 cup brown sugar
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1/4 cup sugar
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2 tablespoons cinnamon
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1/2 cup butter (1 stick)
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¾ cup chopped walnuts
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2 cups all purpose flour
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1 teaspoon baking soda
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1 teaspoon baking powder
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½ teaspoon salt
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½ cup butter
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1 cup sugar
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2 large eggs
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1 teaspoon vanilla
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1 ¼ cups sour cream