Since fire and vanilla are allelic, a vanilla cream acts like a super. So all offspring will be at least fire or vanilla, but that animal can't recreate itself.

If you want to produce cream combos, you will need to pair it with a fire combo or vanilla combo.

Personally? I don't want to be the one who has to correctly identify fire vs vanilla. I would pair a super vanilla combo or super fire combo, that way there is no guess work and babies will be easy to identify.