I love banana bread but also muffins. America's Test Kitchen only has a recipe for banana BREAD (two actually), so I modified it with a Tyler Florence recipe which is actually quite similar to the ATK recipe.... just sayin.
In a bowl combine 2 c flour, 3/4 cup granulated sugar, 3/4 tsp of baking SODA, 1/2 tsp TABLE salt, and a cup of walnuts that have been chopped up and toasted (smitten has tips) on how to do that.
In another bowl, three very ripe bananas mashed up with a potato masher, 1/4 cup of plain wholefat yogurt, 6 tablespoons of melted and cooled butter, two lightly beaten eggs, and a tsp of vanilla extract.
Add the combined banana mix to the dry ingredients and fold in.
Spray a muffin tin (I usually need two, this makes 18 total).
375 on the lower middle rack, for 18-20 minutes. It's muffin time!