Preparation / Directions:
Preheat oven to 350 degrees.
Cream butter and sugar well. Add eggs one at a time, beating thoroughly after each addition. Mash bananas and mix in the baking soda. Add to creamed mixture, alternating with buttermilk. Beat until smooth.
Grease 4 (8-inch) cake pans and pour batter into them. Bake at 350 degrees for 30 minutes. Cool. Frost with icing. May be prepared 1 day in advance. This is a very large, moist cake.
ICING: Mix sugar with Karo; add to the boiling water and stir over medium heat. When the sugar has completely dissolved, remove from heat and cool; then pour very slowly into stiffly beaten egg whites, beating constantly. Continue to beat until icing is stiff enough to spread.