1 1/2 cups mashed ripe bananas
2 tablespoons lemon juice
3 cups flour
1 1/2 teaspoons baking soda
1/4 teaspoon salt
3/4 cup butter, softened
2 1/8 cups sugar
3 eggs
2 teaspoons vanilla extract
1 1/2 cups buttermilk
Preheat oven to 275 degrees F. Grease two 8 inch round baking pans and line with parchment.
In a small bowl, mix mashed bananas and lemon juice. Set aside.
In a medium bowl, stir together flour, baking soda, and salt. Set aside.
In a large mixing bowl, cream butter and sugar until light and fluffy. Beat in eggs one at a time. Stir in vanilla. Beat in the flour mixture alternately with the buttermilk. Stir in banana mixture.
Evenly pour batter into baking pans. Bake 45 minutes or until a toothpick inserted in center comes out clean. Since the cake is baked at a low temperature, the oven times may vary. It is important to keep an eye on the cake and check it often. When the cake is done, place the baking pans directly into the freezer for 45 minutes to cool before frosting.
Buttercream Frosting:
1 cup butter, softened
1 teaspoon vanilla extract
3 1/2 to 4 cups powdered sugar
1 to 2 tablespoons milk
To make the frosting, cream together all ingredients, adding milk gradually as needed for desired consistency. Whip until light and fluffy.