Tips for making the BEST Banana Bread Crumb Muffins:
Do NOT over mix the batter. Mix the batter just until the flour is combined.
Slightly underbaking the muffins and allowing them to sit in the hot pan for a few minutes will result in a moist, fluffy muffin. Letting them cook all the way in the oven will result in a dry muffin (boo). Moist crumbs should cling to the toothpick inserted into the center.
Use your finger to pinch some of the crumb topping together if you prefer larger crumbs.
Don’t overdo it with bananas. 1 1/2 cups are plenty. More could result in the texture going from moist and fluffy to soggy.