Below are a couple of the food safe oils that I have used in the past for some of the wooden cutting boards, bowls and spoons I’ve made.
UltraSource Food Grade Mineral Oil – This is one of my go to finishes when I’m making something that goes in the kitchen, particularly because it is approved by the NSF. It comes in a gallon, so it will last you a while. Personally, when I’m doing batches of cutting boards or bowls, I’ll pour this into a container that allows me to place my cutting board into it and let it soak for a while. I pull it out and it’s ready to go. As you’ll see on the page, it comes with excellent reviews fro many other users as well.
Heritage Natural Tung Oil – If the gallon size of the mineral oil is more than you need, this is another option. This particular brand of tung oil is approved by the FDA. Another big plus is that it is very affordable. A little goes a long way, so when you apply it, make sure you don’t go overboard. It’s very easy to apply and clean up. The final finish of the product is a matte looking finish, which in my opinion is preferred when you are wanting to bring out the natural beauty of wood.