Muffins:
3 ripe bananas, mashed
1 egg
1 1/2 cups flour
1/3 cup melted butter
1 teaspoon vanilla
1 teaspoon baking soda
1 teaspoon baking powder
1/2 teaspoon salt
3/4 cup brown sugar
Crumble topping:
2 tablespoons flour
1/3 cup brown sugar
1/4 teaspoon cinnamon
1 tablespoon butter
Preheat the oven to 375 degrees. Mash the bananas. Add in the melted butter, eggs, and vanilla. Slowly mix the remaining ingredients while stirring fully between ingredients. Pour batter into 6 prepare jumbo muffin cups. Mix the crumb topping until all ingredients at the same time. Sprinkle topping equally on all the muffins. Bake 18-20 minutes. Or until a toothpick inserted in the center comes out clean. Remove immediately from the pan.