To make superhero muffins vegan, you can replace the butter in the recipe with coconut oil or vegetable oil, and the eggs with homemade u003ca href=u0022https://minimalistbaker.com/how-to-make-a-flax-egg/u0022u003eflax eggsu003c/au003e. I've never done this, so if you give it a try let me know how it goes!