corn tortillas - GF

every recipe I have TRIED to make gluten-free corn tortillas has made me frustrated because they taste plain, crack easily, and require heaps of patience on my part. This recipe was an experiment, but it worked!! Xanthan gum is not very common, but its so important for this recipe! I hope you find some....
2 cups corn flour (masa harina)
1/4 cup powdered milk
2 tsp xanthan gum
1/2 tsp salt
1 cup warm water
1 tsp olive oil
1 egg

Combine dry ingredients in a medium bowl. Add water, egg & oil - mix until it becomes a doughy consistency. Form into a ball, and let stand covered for 30 minutes. You can also wrap it in saran wrap, to keep it moist. Then form into 5-8 balls and press individually between wax paper in a tortilla press. Brown each tortilla in a non-stick skillet (about 1 minute on each side) until lightly browned (no oil needed). Enjoy!!