Step 1

Heat oven to 375 degrees. Spray bottoms only of 12 regular-size muffin cups with cooking spray. Or you can also use liners.

Step 2

In medium bowl combine the sugar, oil, eggs and stir with wire whisk. Add in bananas and vanilla, whisk until combined.

Step 3

Add in flour, baking soda, salt, and cinnamon and stir together until just combined.

Step 4

Divide batter evenly among muffin cups. Each muffin cup will be almost to the top. About 3/4 full.

Step 5

Bake 17 to 21 minutes or until toothpick inserted in center comes out clean and muffins are high and rounded on top. The tops of the muffins should not look wet (that means they're not fully cooked).

Step 6

Remove muffins from pan to a cooling rack.

Step 7

For the cinnamon & sugar topping : Combine the sugar and cinnamon in a small bowl. Put melted butter in a separate small bowl. Dip muffin tops into melted butter and then into cinnamon-sugar. Serve warm or let cool completely.