Preheat your oven to 350°F (175°C, or gas mark 4).
Prepare a baking pan with muffin liners.
Combine coconut flour, baking soda, salt, and cinnamon in a bowl and blend well.
Add the eggs, milk, and sweetener to the dry mixture and blend well with a spatula or use a mixer or food processor. Let the batter sit for a few minutes to allow the coconut flour to absorb the moisture.
Fill muffin liners all the way with batter.
Bake for about 35 minutes, or until a toothpick inserted in the center of a muffin comes out clean.
Cool and store sealed in the refrigerator or freeze for a few months.