3/4 cup butter (nothing else will do)
1 1/2 cup sugar
1 1/2 cup mashed bananas
1 tsp. vanilla
2 cups flour
1 tsp. baking soda
1 tsp. salt
1/2 cup buttermilk or *sour milk
Heat the oven to 350. Combine the butter and sugar mix well. Blend in the bananas, eggs, and vanilla. Sift together the flour soda, and salt. Add alternating to the creamed mixture with the buttermilk. Blend until well combined. Pour into a greased loaf pan. Bake for 50-70 minutes depending on how large your pan is and how hot your oven runs. Check with a skewer, and it should come clean. I usually tent my pan with foil about half way to keep it from getting too brown.
*sour milk: In a measure cup put 1 tbsp. vinegar and a little less than a 1 tsp. vanilla fill with milk to 1/2 cup.