Preheat oven to 350° F (unless using cookie cutters, then wait until after chilling dough.
Mix all dry ingredients from cookies in a large bowl: almond flour, erythritol, baking soda, sea salt.
Add all wet cookie ingredients to a seperate bowl, and whisk: egg, vanilla and coconut oil.
Mix wet cookie ingredients into dry ingredients until combined well.
NOTE: Chill for about an hour before rolling out if you want to use cookie cutters. (Roll out on parchment paper- TRICK: put a slightly damp paper towel under the parchment paper to keep if from sliding around on you. You may need to dust with extra almond flour to keep from sticking).
Depending on how big you want them, take the batter and form it a bit in your hand and place on a parchment lined baking sheet or silicone baking mat.
Bake cookies at 350° F for 10 minutes or until golden brown.