Hey darlin!
cute pics!
I would say protein powder is the lowest carb "filler" or flour you can find. The carbs come from the sweetener, but if you subbed, say, Stevia powder or liquid Splenda (in the form of da vinci syrup) it would be very low carb. Any other flours; soy, wheat gluten, almond and other nut flours, are actually higher carb from my experience. I can't wait to try it with the da vinci syrup to make it low carb.

good luck! and thanks for voting for my pics.
Sheri