Topping your banana muffins with this addicting streusel topping is a breeze. Be sure to make enough!
Heat oven to 400 degrees. Grease bottoms only of 15 medium muffin cups. Mix all ingredients. Beat bananas, oil, milk, egg, and vanilla in medium bowl with spoon until smooth. Stir in ploye mix, sugar, and nuts all at once until flour is moistened (hatter will be lumpy). Divide among cups; sprinkle with Streusel Topping. Bake for 20 minutes or until golden brown. Immediately remove from cups.