Mix protein powder and coconut flour until combined.
Add vanilla (optional) and almond-coconut milk (start with 3 tablespoons, and add more if necessary).
Work the ingredients with your hands into a dough. Once well combined, flatten it out a bit and add chocolate chips. Fold the dough a few times to incorporate the chips evenly.
Shape the dough into a rectangle, and cut into two bars.
Enjoy! Store in an airtight container in the refrigerator. Wrap in parchment to carry with you.
Notes
A note about substitutions: If you would like to replace the whey/casein blend with whey only, double the coconut flour. If you'd like to replace it with casein only, half the coconut flour. The vanilla Quest protein powder has a little sucralose. So if you'd like to keep it all-natural, use their multipurpose (unflavored) powder, and add some alcohol-free vanilla extract.