Banana Yogurt Muffins and Little Banana Bread Loaf

to 1 1/4 cups mashed banana (3 medium/large ripe bananas)

large egg

Greek yogurt (I used Lowfat banana Chobani, sour cream may be substituted))

canola or vegetable oil

granulated sugar

light brown sugar, packed

vanilla extract

to 2 teaspoons cinnamon, or to taste

all-purpose flour

baking powder

baking soda

salt, optional and to taste

about 1/4 cup sprinkles, divided; optional but recommended