I've made crackers with arrowroot and egg before that my baby loved. I got the recipe
from here.
It was:
Cream together 1 stick of butter (or 1/2 cup coconut oil) with 2 egg yolks. Mix in 4 tbsp water, 1 cup arrowroot powder, 1/2 tsp salt and 1/2 tsp stevia powder. Spread on a well oiled baking tray and bake at 200oF for about 2 hours, until dry and easy to break up.
I didn't have any stevia so I just left that out and my baby still thought they were great.