This recipe was published a few months back in a catalog by my favorite baking/cooking company, Penzey's Spices. One of their regular users has shared his family's recipe and this one has gotten countless raves from the people with whom I've shared it, even those who rarely eat sweets.
1 1/2 cups sugar
2 eggs
1 tsp pure vanilla extract
2 cups flour
1/4 tsp baking powder
3/4 tsp baking soda
1/2 tsp salt
1 cup mashed, very ripe bananas (2 large)
1 cup buttermilk or sour milk (mix 1 cup milk with 1 Tbsp vinegar to make sour milk)
1 cup mini semi-sweet chocolate chips, optional
Preheat oven to 350°. In a large bowl, cream together the shortening and sugar. Add the eggs and VANILLA and mix well. Add the flour, baking powder, baking soda and salt. Mix well. Add the bananas and buttermilk and mix. Fold in the chocolate chips, if using. Pour the batter into a greased and floured bundt pan. Bake at 350° for 60-75 minutes. Test the center to determine whether it is done—it should be risen, brown, springy to the touch, and a toothpick should come out mostly clean.