Get the latest Crumbly-topping flavored recipes from Group Recipes. http://www.grouprecipes.com/tag/crumbly-topping These muffins are easy to make and the cinnamon strudel is a nice addition. You can use different types of apples for different texture but I use Granny Smith or Braeburn. This recipe originally came from Allrecipes.com. http://www.grouprecipes.com/8252/apple-strudel-muffins.html