In a small bowl or 2 cup measuring cup combine the warm water, sugar and yeast. Allow to stand for a few minutes to get bubbly.
Measure the flour blend, buckwheat flour, milk powder, salt and xanthan gum into the bowl of a food processor. Pulse several times to combine.
Add the shortening and pulse several times until the shortening is evenly distributed. Add in honey and beaten egg. Slowly add in water until mixture is wet. It should be the consistency of a thick muffin batter.
Preheat oven to 350 degrees. Spray English muffin rings with a non-stick cooking spray, pour a small amount of additional flour blend in to a bowl and dip the prepared muffin rings in to flour lightly.
Place the prepared rings on a cookie sheet that has been lined with parchment paper or baking mat. Scoop dough mixture into rings. With with the back of a spoon, lightly smooth the tops of the dough. Allow to rest in a warm place for 15 minutes.
Put cookie sheet into oven and bake 10 minutes. With a spatula, gently flip rings and continue to cook for an additional 10 to 15 minutes. Turning them will prevent them from rising above the rings and produce better formed and more evenly cooked muffins.
Split with fork and serve warm or wrap individually, bag and place in freezer. Defrost and toast to desired crispness.