INGREDIENTS
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2 cups all-purpose flour
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2 teaspoons baking powder
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1/4 teaspoon baking soda
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1 teaspoon salt
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1/2 cup white sugar
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1 tablespoon grated orange zest
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2/3 cup orange juice
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1/2 cup melted butter
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2 eggs
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1/2 cup ground walnuts (optional)
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1 tablespoon melted butter
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1/4 cup packed brown sugar
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1/2 teaspoon ground cinnamon