As much as I enjoy peanut butter muffins, most of all, I like to make them from scratch. Whenever I go to the grocery store, one problem is that they're very processed. If you want an example, the next time you go to the store, look at the ingredients on the back of a package of muffins. Even though it will definitely have the main ingredient (whether it's blueberries, cranberries or peanut butter), one thing you'll also notice is that there are plenty of extra ingredients as well. Usually, this is due to how products have to stay in the store for longer, and fillers and preservatives have to be added. Overall, when it comes to homemade food and the store bought kind, they're both something that need to be taken into consideration.