Tastes-like-gingerbread Teff Muffins

I take it as a sign of success when the gluten-free kid is indifferent about a food, and the allergy-free kid asks for seconds and thirds, as happened with these muffins. I could only try a nibble, since the cinnamon adds too much salicylate for me, but I was told that they taste like gingerbread.

Mix:
1/2 cup brown sugar
1 1/2 cups teff flour
1/2 cup arrowroot starch (available at a well-stocked Indian grocery; you could probably use tapioca starch if it's easier to find)
1 tsp baking powder
1/2 tsp cinnamon
1/4 tsp salt

Add:
2 Tbsp ground flaxseed plus 6 Tbsp water (let it sit for a few minutes first)
1/2 cup vegetable oil (eg, canola)
3/4 cup water or soy milk

Bake at 400 for 25 min in greased muffin tins.