Banana Oat Muffins with Sour Cream
Ingredients:
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1 cup rolled oats
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1 cup all-purpose flour
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1 tablespoon rolled oats
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½ cup chopped walnuts
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1 teaspoon baking soda
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1 teaspoon baking powder
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¼ teaspoon ground cinnamon
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½ teaspoon salt
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½ cup butter, softened
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1 cup white sugar
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2 eggs
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1 cup mashed ripe banana
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1 teaspoon vanilla extract
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½ cup sour cream
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⅓ cup rolled oats
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4 tablespoons brown sugar
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¼ teaspoon ground cinnamon
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2 tablespoons butter, chilled
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¼ cup chopped walnuts