Brown Sugar Banana Muffins

Ingredients (10)

• 1/2 cup (1 stick) butter,
• 1 cup packed light brown sugar
• 2 large eggs
• 1 cup mashed ripe banana
• 1/4 cup buttermilk
• 1 teaspoon vanilla extract
• 2¼ cups all purpose flour
• 3/4 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt