In a medium bowl, melt coconut oil or butter. Add sugar, vanilla, baking soda, salt and whisk well. Add egg and whisk very well. Make sure coconut oil isn't too hot to cook the egg.
Add almond flour and stir to combine. Add chocolate chips and give a few stirs just to incorporate. Transfer into prepared skillet and level with spatula.
Bake uncovered for 20-25 minutes or until top is nice golden brown.
Remove from the oven and let skillet cookie cool for 10 minutes. If you have a willpower to let cookie cool down longer, it will become more chewy. It is hard though. Cut into 8 slices and enjoy!
Video
Notes
Store: Cover with a towel and leave on a counter for up to 48 hours.
Make ahead: Cookie dough can be refrigerated for 2 days or frozen for up to 3 months. Thaw but no need to warm up before baking.
Has to be almond flour. Probably almond meal will work, cookie will be more dense.
Measure oil or butter before melting approximately.
Texture: Butter will yield more soft cookie, coconut oil cookie will have more crispiness.