Preheat the oven to 350 degrees, Grease/spray & flour three 8 inch pans and line with parchment circles (or your prep method of choice).
In the mixing bowl, add the dry ingredients, sugar, flour, cinnamon, baking soda, baking powder, & salt. Turn on the mixer and blend for 30 seconds to incorporate ingredients
Add the softened butter to the dry ingredients and mix on low speed until the dry ingredients are moistened. Scrape the bottom and sides of the bowl
In a separate bowl, slice and mash the bananas, add lemon juice, eggs, 2 teaspoons vanilla and buttermilk. Lightly mix these ingredients with a fork to blend
Slowly add the banana/buttermilk mixture to the dry ingredients beating on medium speed for 1 minute, scrape the bottom and sides of the bowl and beat another minute.
Pour batter into the prepared pans and bake at 350 degrees for 25-30 minutes or until the cake springs back to the touch and a toothpick comes out clean.
Cool the cakes 10 minutes on the rack and then turn out.