Those that have nut allergies many times have a peanut allergy too. This is not always the case, but err on the side of caution by putting the fact that in contains nuts in the notes section. The life you save may be that of a child whose parent did not now Butterfingers contains nuts. Don't mean to be preachy, but not everyone have common sense these days.
Seriously. If you are looking for nut-free recipes, 99% of the time someone in your family has a peanut allergy. This recipe could kill them. Butterfingers are not nut-free. They are made with peanuts. Don't get into the semantics of peanuts versus nuts. Not with people's lives at stake.
I love this cake:) IT IS SOOO GOOD. The next time I make it will be for Thanksgiving (coming up soon) & I will add some Butterfingers to the cake mix & see how that works. My husband ate most of the cake which is unusual as he only likes a little sweets. He loved it too.