Blend melted butter and sugar until smooth. Add eggs, one at a time until well blended. Mix in mashed bananas.
Mix baking soda into sour milk (can be made with 1 tbls vinegar or lemon juice mixed into the milk) Be careful....it will expand!! Mix 1 cup four into batter, then 1/3 of the milk, another cup of flour, another 1/3 of the milk, the last cup of flour and final 1/3 of milk. Make sure batter is well blended.
Pour into greased and floured cake pans. Makes 3-8" pans, or 2-9" pans, or 1 Bundt pan.
Bake at 300 for 45-60 minutes
Let cool completely and ice with your favorite icing. Particularly good with home made chocolate icing!!