Preheat oven to 275 degrees. Grease your pans. (This recipe will fill a 9 x 13 pan or 2, 8″ round (2″ deep) pans.
In a small bowl, mix mashed bananas with lemon juice and set aside.
In a medium bowl, mix flour, baking soda, pudding mix & salt; set aside.
In a large bowl mix oil & sugar for about 2 minutes.
Beat in eggs, one at a time, then stir in the vanilla extract.
Beat in the flour mixture, alternating with portions of the buttermilk, until both are just incorporated.
Stir in the banana mix & sour cream
Bake for 1 hour (I’ve found that I often need more like an hour and 20 minutes), or until inserted toothpick comes out clean.