Preheat oven to 350 degrees.
Beat bananas, butter and sugars together until smooth.
Add eggs one at a time.
Fold in vanilla and yogurt.
Mix in flour, salt, cinnamon and soda.
Spread in greased 10 x 15 pan. Bake for 20-22 minutes or until bars are set.
Cool. Frost with cinnamon cream cheese frosting.
Cream butter and cream cheese together until smooth.
Add vanilla, cinnamon, powdered sugar and dash of salt. Beat until smooth.
If consistency is too thick add milk a little bit at a time. If consistency is too thin add more powdered sugar.