Banana Cake - Challenge Dairy

Ingredients

• 2 ½ cups mashed very ripe bananas (about 4 bananas)
• ⅓ to ½ cup buttermilk
• 1 teaspoon vanilla extract
• ½ cup (1 stick) Challenge Unsalted Butter
• 1 ½ cups sugar
• 2 large eggs
• 2 ¼ cups all-purpose flour
• 1 teaspoon baking soda
• ¾ teaspoon salt
• ¾ cup chopped walnuts