I found this recipe - titled Banana Banana Bread - on Allrecipes, then found a Pinterest link to the blog For the Love Of Cooking, which had an adaptation of it, adding vanilla and cinnamon - winner!!
1/2 c butter, softened
3/4 c brown sugar
2 1/3 c mashed overripe bananas (I used 5 small bananas)
1 tsp vanilla
2 c flour
1 tsp baking soda
1 tsp cinnamon
1/4 tsp salt
1/4 tsp nutmeg
Preheat oven to 350 degrees, and coat a 9x5 loaf pan with oil. I whipped out my new cast iron bread pan, which is fantastic!
In a large bowl, beat together butter and sugar until creamy. Add eggs, bananas, and vanilla, then beat until well mixed.
In a separate bowl, combine flour, baking soda, cinnamon, salt, and nutmeg, and mix well (by hand). Add flour mixture into banana mixture and stir just until moistened - do not over mix, or the cake will become very dense. Pour batter into the loaf pan, and bake for 60 minutes, or until a skewer inserted in the center comes out clean.