Blend bananas
with mixer, adding your sour cream. When mixture is well blended,
not lumpy, add your cake mix, egg whites, oil, milk, flavoring
together and mix. Add milk last so you will be able to judge the
consistency of the cake and adjust as needed.
Once well
blended, pour mixture into a greased/sprayed, 9x13 cake pan or 3
cake layers.
Bake at 350F
for about 25 min. or until the cake is done.
Cake will
spring back in the center when touched if done, don't over bake!
Remove cake from oven and allow to cool.
Tip: Place
wax paper over cakes to capture the moisture while cooling; this
adds to a really moist, delicious cake!
Mix cream cheese and butter
together in a bowl. Add powdered sugar and vanilla. Mix until you
get the consistency you like.
Add a little milk to the
frosting while mixing if you like it to be creamy. When icing is
done, add 1/3 chopped walnuts to the icing. Crush them right out
of the package with the end of a blunt object to make smaller
pieces.
Stir walnuts into frosting
well. After cakes have cooled, frost each layer with icing.