muffins4 ounces cream cheese softened1/4 cup (1/2 stick) butter, room temperature2/3 cup, packed imperial sugar light brown sugar 1 egg1 medium banana, mashed (about 1/2 cup)1 teaspoon vanilla1 teaspoon baking powder1/2 teaspoon salt1 1/4 cups all-purpose flour*topping1 medium banana,