In a large blender, combine the eggs, almond milk, oil, and vanilla. Blend 30 seconds to combine.
Add the almond flour, sweetener, baking powder, salt, and cinnamon (optional), and blend again until smooth. Let the batter rest 5 minutes.
Heat a large nonstick skillet over medium-low heat and add butter or oil to lightly grease (I'm partial to butter in this case). Put about 3 tablespoons of the batter in the pan for each pancake and gently spread into a 3 or 4 inch circle.
Cook pancakes until bubbles begin to appear in the batter and the edges are set and dry, 2 to 4 minutes.
Carefully flip the pancake and continue to cook until golden brown on the second side, another 2 to 4 minutes. Repeat with the remaining batter, adding more butter or oil to the pan as needed.
The batter keeps well in the fridge for a couple days.