Delicious and Nutritious Banana Cranberry Nut Muffins

Ingredients

• 1 1/2 cups all-purpose flour
• 3/4 cup granulated sugar
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup unsalted butter, melted
• 2 ripe bananas, mashed
• 1 egg
• 1/2 cup buttermilk
• 1 teaspoon vanilla extract
• 1 cup fresh or frozen cranberries
• 1/2 cup chopped nuts (such as walnuts or pecans)