PrehHeat oven to 350 degrees F.

Spray a 9 x 13 inch pan with non-stick cooking spray.

In a large mixing bowl, combine the sugar and butter, scraping down the sides of the bowl. Whip about 1 minute until light and fluffy.

Stir in the eggs one at a time and beat well after each addition.

Add bananas, yogurt, and vanilla. Blend well.

In a small bowl, combine the flour, baking soda, salt, and cinnamon. Stir to combine.

Add the dry mixture and pecans to the banana batter. Stir quickly just until dry ingredients are combined.

Pour batter into the prepared pan. Bake at 350 degrees for 40 minutes or until toothpick inserted in center comes out clean. Since ovens vary, you might need to cook an additional 10 minutes to get the center cooked.

Remove from the oven and allow to cool on a rack for about 45 minutes or until completely cooled.

Cut into squares and serve. Wrap any leftovers in an airtight container and refrigerate for up to 5 days.