INGREDIENTS
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2 cups all-purpose flour
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1 teaspoon baking powder
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1 teaspoon baking soda
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1/4 teaspoon salt
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1 stick butter
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1 1/4 cup sugar
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2 eggs
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1 cup sour cream
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1 teaspoon vanilla extract
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8 ounces semisweet chocolate, coarsely cut
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1/2 cup chopped walnuts
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2 teaspoons ground cinnamon