Banana Roll

This was served at our wedding reception. I have used it numerous times since then. My MIL got the recipe from a friend. She gave it to others and was consequently told it was a secret recipe and it was not to be shared. Oops. So here's the "secret" recipe.
Just mix it up in the blender.

3 eggs
3/4 c. sugar
2/3 c. mashed banana
1 tsp. banana flavoring (I just substitute vanilla)
1 tsp. baking soda
3/4 c flour

Beat together eggs and sugar for 5 minutes. Add remaining ingredients. Grease and flour a Jelly roll pan (or a 10x15 cookie sheet with a low side). Pour onto pan (make sure it's very even) and bake at 375 F for15 minutes (don't over bake!)
Sprinkle a flour sack - or towel (not terry cloth)- with powdered sugar. Loosen with spatula and dump cake onto towel. and roll up in a jelly roll (it's OK if the towel is rolled up inside). Cool for at least 20 minutes and then unroll and frost. Reroll and wrap until ready to cut and serve. Can be frozen.

Frosting:
1 8 oz. pkg cream cheese
4 tsp. butter
1 c. powdered sugar
1 tsp. vanilla
Beat well and add 1/2 c. nuts if desired.