I recommend using parchment muffin liners so the muffins are easy to remove.For SCD, honey only.As for type of oil, I usually use sunflower, but olive oil or other light work as well. I'd avoid an oil with a strong flavor that will interfere with the lemon flavor. I don't recommend coconut oil because some readers have told me it doesn't work.You can substitute oil with applesauce though, which is a great option!