Today I made banana bread and banana bread muffins. I quadrupled the recipe. I added pumpkin pie spice to half.

I used this recipe:

http://www.geniuskitchen.com/recipe/best-banana-bread-2886
I did use vanilla and adjusted the cooking time for muffins.

INGREDIENTS
1⁄2 cup butter
1 cup sugar
2 eggs, beaten
3 bananas, finely crushed (for serious and extreme moist and delicious, try 4 bananas)
1 1⁄2 cups flour
1 teaspoon baking soda
1⁄2 teaspoon salt
1⁄2 teaspoon vanilla (optional)

DIRECTIONS
Remove odd pots and pans from oven.
Preheat oven to 350º.
Cream together butter and sugar.
Add eggs and crushed bananas.
Combine well.
Sift together flour, soda and salt. Add to creamed mixture. Add vanilla.
Mix just until combined. Do not overmix.
Pour into greased and floured loaf pan.
Bake at 350 degrees for 55 minutes.
Keeps well, refrigerated.