Tender apple crumb muffins with caramelized cinnamon apples and a crunchy crumbly brown sugar crumb topping. Make a batch for a teacher in your life!
*1 cup diced apples is equal to about 1 large apple. If you are a little over or under 1 cup, don't worry about it. Granny Smith Apples are my preferred baking apples, but most apples (not Red Delicious) will work fine for these muffins.