Cover the bottom of your blender with water (~1/4 cup). Layer your protein powder, maca powder, cinnamon and optional psyllium husk powder first then top with the frozen blueberries and finally the ice.
Use your tamper (if using a vitamix) while blending to push down the ice until it is smooth and there are no more ice chunks. It will be very thick.
Either eat from the blender to save on dishes, or scoop out into a bowl (or more as desired), top with any toppings and eat immediately.
This will be VERY thick. Do not add more liquid if you want it to be of soft serve consistency. It will blend up, just be patient. Use your tamper if you have one.
Make sure you blend it enough so you don't have ice chunks, but don't overblend otherwise it will get watery.
I eat this as one serving, it makes A LOT. (I love eating, so lots of volume is great for me). Feel free to break this up into a few servings if you want little bowls for multiple people.