Banana Nut Muffins Recipe

Ingredients

• 1/4 cup butter, softened
• 1/2 cup sugar
• 1 egg
• 3/4 cup mashed ripe banana
• 1/2 teaspoon vanilla extract
• 1 cup all-purpose flour
• 3/4 teaspoon baking powder
• 1/4 teaspoon salt
• 1/8 teaspoon baking soda
• 1/8 teaspoon ground cinnamon
• 1/4 cup chopped walnuts