Ingredients:
- * 2 1/2 cup cake flour
- * 1 teaspoon baking soda
- * 1/2 teaspoon baking powder
- * 1/2 teaspoon salt
- * 2/3 cup buttermilk
- * 1 teaspoon pure vanilla extract
- * 1/2 cup unsalted butter, room temperature
- * 1 cup granulated sugar
- * 3/4 cup firmly packed gentle brown sugar
- * 2 vast egg
- * 3 vast ripe banana, mashed (about 1 1/2 cup)
- * 1/2 cup walnut, finely chopped, non-obligatory
- cream cheese frosting:
- * 8 ounce cream cheese, room temperature
- * 6 tablespoon unsalted butter, room temperature
- * 1 teaspoon pure vanilla extract
- * 2 1/2 cup confectioner' (powdered) sugar
- garnish:
- * 2 tablespoon walnut, finely chopped, non-obligatory
- * unusual banana cleave, non-obligatory