You can use the body butter on your face only if your recipe contains NO comedogenic ingredients (butter or oil that can clog the pores and cause breakouts).
Anything higher than 2 is not recommendable.
For example, cocoa butter and coconut butter comedogenic ratings are 4. Shea butter and safflower oil comedogenic ratings are 0. (find a list with most oils and their ratings)
Nevertheless, you can give it a try and see how it feels. Just don’t put a thick layer.