"Banana walnut muffins with a streusel topping...."
INGREDIENTS
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3 ripe bananas, mashed
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1/3 cup butter, melted
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1 egg
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3/4 cup granulated sugar
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1 teaspoon vanilla
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1 1/2 cups all-purpose flour
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1 teaspoon baking soda
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1/2 teaspoon salt
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1/2 cup walnuts, chopped
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1/3 cup brown sugar
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1/4 cup flour
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2 tablespoon cold butter, cubed