Apple Cinnamon Muffins with Walnut Streusel

In addition to the pineapple coconut muffins I made last night, I also decided to make another fruit-themed batch (when baking fever hits, take full advantage!).Of the two, these were probably my favourite. The walnut crunchy streusel definitely makes it addictive.The recipe is almost the same as the pineapple coconut ones. I like the use of oil in this recipe as it means you don't have to worry