Preheat the oven to 350°F and line a baking sheet with parchment paper.
Blend the cottage cheese, egg, brown sugar, melted butter, and vanilla extract until silky smooth.
Whisk the chocolate protein powder, flour, cocoa powder, espresso powder, baking powder, and salt in a bowl.
Stir the blended cottage cheese mixture into the dry ingredients until no dry streaks remain.
Fold in the mini chocolate chips, then chill the dough for 25 minutes.
Scoop 12 portions onto the baking sheet and gently flatten each one.
Bake for 10 to 12 minutes, until the centers look just set. Cool the mocha cookies on the baking sheet for 10 minutes before serving.