Banana Crumble Muffins – Calhoun Bend Mill

Ingredients

• 1 ½ cups all-purpose flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• ½ teaspoon salt
• 3 large ripe mashed bananas
• ¾ cup white sugar
• 1 large egg
• ⅓ cup melted butter
• 1 cup chopped walnuts (optional)