The customer doesn't want gluten, dairy, or soy in the cake. I have the gluten and dairy free covered but not sure about the soy. Any advice y'all can give me?

I was not aware there was any soy in a cake unless the baker chose to use soy milk???

Are y ou baking from scratch or mix?  As Sandra said, don't think there is any soy involved - especially if you bake from scratch.

Soy is in everything - it hides in places that you never saw coming lol - however if you check all your labels they should list soy as an allergen (at least in Aus they do).

Both my children have been dairy/soy intolerant so I have spent many years checking labels. If you have a look in your health food aisle you will most likely be able be able to find a soy free alternative if using cake mix. If baking from scratch just check your labels but you should be fine.

Nuttelex is both dairy/soy free and works well for baking, I have found though that when making icings it can tend to give the icing a flecked look, still tastes great and holds up just fine though. If you want dairy free/soy free chocolate you will most likely have to use cocoa powder as I am yet to find a chocolate that contains neither.

If you have a recipe that is both GF DF and SF would you mind sharing it, ha my 3 month old son (Exc BreastFed so no D or S for me) is D is tolerant and my Grandma is G intolerant, would love to find a perfect  recipe (box is fine) that we can all eat without having to keep experimenting. Thanks.

** D and S intolerant not D tolerant sorry, silly CC not letting you edit your own post!