Preheat the oven to 250 F.
Mix almond flour, maple syrup, salt. Add vanilla extract, if using.
Add melted coconut oil and mix immediately to avoid hardening of the oil.
Mix baking soda with apple cider vinegar and add to the almond flour mixture.
Add chocolate chips, or divide the dough into two parts and add the chip only to one part.
Form balls and flatten them with your fingers. The cookies will not spread while baking, so shape them for your liking.
Place the flattened balls on a baking pan which is covered with unbleached parchment paper.
Bake the cookies in a preheated oven for 30 minutes at 250 (It's safer to cook nuts and nut products at lower temperatures, but if you are in a rush, bake them for 12 minutes at 350 F.)
Store them in the fridge or in the freezer.