These are half white flour/half whole wheat flour. That gives you the benefit of having whole wheat without everyone turning up their noses at it because the muffins are too grainy. In fact, if you don’t tell, no one will guess that they’re have whole wheat flour in them.
You really need the bananas to be ripe. They provide a good amount of the sweetness and moisture to the muffins that won’t be there if you use under ripe bananas.
You’ll be surprised at how far the 1/2 Cup of mini chocolate chips goes. I love using mini chips in my baking because I get all of the chocolate flavor with less calories and sugar. Always a staple at our house!