-I do not recommend substituting whey protein powder for the collagen.
-I use
Konjac Foods brand glucomannan, which isn't quite as strong as
THM's glucomannan from what I've heard. In my ice cream recipes I often remind people to decrease the glucomannan amount if they're using a strong brand and notice a funny taste or texture. It shouldn't make as much of a difference in baked goods, but if you notice that something is off, try decreasing the gluccie. You may be able to substitute
xanthan gum for the glucomannan, but I haven't tried that in this recipe. These pudding cakes are best warm since the gluccie will start to solidify when it cools.
-Not into microwaves? Bake it at 350* until the desired texture is reached.