Banana Cake with Cream Cheese Frosting

Ingredients

• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 cup unsalted butter, softened
• 1 cup granulated sugar
• 1/4 cup packed brown sugar
• 2 large eggs
• 1 1/2 cups mashed ripe bananas (about 3-4 bananas)
• 1/4 cup sour cream
• 1 teaspoon vanilla extract
• 1/2 cup chopped walnuts (optional)
• For Cream Cheese Frosting:
• 8 ounces cream cheese, softened
• 2 cups powdered sugar