Mike had 3 bananas that were too brown and soft to eat, so I turned them into banana crumb muffins.

Banana Crumb Muffins
adapted from allrecipes.com

1 1/2 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon baking powder
1/2 teaspoon salt
3 bananas, mashed
3/4 cup white sugar
1 egg, lightly beaten
1/3 cup butter, melted
1/3 cup walnuts, chopped
1/3 cup packed brown sugar
2 tablespoons all-purpose flour
1/8 teaspoon ground cinnamon
1 tablespoon butter

1. Preheat oven to 375°F. Lightly grease 10 muffin cups or line with muffin papers.
2. In a large bowl, mix together 1 1/2 cups flour, baking soda, baking powder and salt. In another bowl, beat together bananas, sugar, egg and melted butter. Stir the banana mixture and walnuts into the flour mixture until just moistened. Spoon batter into prepared muffin cups.
3. In a small bowl, mix together brown sugar, 2 tablespoons flour and cinnamon. Cut in 1 tablespoon butter until mixture resembles coarse cornmeal. Sprinkle topping over muffins.
4. Bake for 18 to 20 minutes, until a toothpick inserted into center of a muffin comes out clean.