I need to find out whether whey protein isolate can be substituted for soy protein isolate? This is in a brownie recipe, but just in general for dessert recipes? And--of lesser importance-- do cookbook authors usually use sweetened or unsweetened protein powders, or should they indicate?

I looked for help in the front of the book, but not much forthcoming there. Can anyone advise?

Many thanks in advance,
Leigh

I would do what the author specified to get the same results. In something like a muffin recipe, swapping doesn't seem to cause a problem. In other recipes like puddings custard, or candy, it would

In most of the recipes I've seen, it specified whether the protein powder is sweetened or unsweetened. I only use unsweetened.

Karen

Many thanks, I appreciate it!

Datahamstr