Heat the oven to 425 or 375 for regular.
Fill a texas sized or regular muffin pan with cupcake liners or spray with nonstick spray.
In a mixer, combine the butter, sugars and eggs until smooth.
In a separate dish, whisk together the flour, baking soda, baking powder, cream of tartar and salt.
In another dish, mash the bananas.
Starting with the dry ingredients, add a little into the butter and mix, then a little banana, and alternate back and forth until you end with the last of the banana.
Spoon into the muffin tin, sprinkle with topping and bake for 15-20 minutes.