Line an 8x4 inch loaf pan with parchment paper.
In a large mixing bowl, whisk together the chocolate protein powder, oat flour, and cocoa powder until well combined.
Add the almond butter and maple syrup to the dry ingredients and stir until a crumbly dough forms.
Gradually add almond milk one tablespoon at a time, mixing until the dough is thick and pliable, similar to brownie batter.
Fold in the chocolate chips.
Press the mixture firmly and evenly into the prepared loaf pan.
Refrigerate for at least 30 minutes to set.
Lift the bars out of the pan using the parchment paper and slice into 8 equal bars.