Created by KittenCal on October 31, 2011
Step 1: Preheat oven to 350 degrees F, thegrease an 8-inch baking pan (can use a 9-inch pan).
Step 2: In a medium bowl beat the butter with sugar until light (about 3 minutes)
Step 3: Add egg and beat until light and well blended (about 2 minutes).
Step 4: Beat in buttermilk and vanilla until smooth and blended.
Step 5: Mix in the mashed banana until just combined.
Step 6: In a small bowl combine the flour with next 5 dry ingredients; add to the creamed mixture using a wooden spoon or electric mixture on low speed mix until just blended (do not over mix).
Step 7: Transfer tho baking pan.
Step 8: Bake for 25-30 minutes or until cake tests done.