Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
Mix dry ingredients: In a large bowl, combine protein powder, almond flour, coconut flour, baking soda, and salt.
Mix wet ingredients: In another bowl, whisk together almond butter, melted coconut oil, honey, egg, and vanilla extract.
Combine: Add wet ingredients to dry ingredients. Mix until well combined. If too dry, add almond milk gradually.
Add chocolate chips: Fold in sugar-free chocolate chips.
Form cookies: Roll dough into 12-15 balls. Place on prepared baking sheet and flatten slightly.
Bake: 10-12 minutes or until edges are lightly golden.
Cool: Let rest on baking sheet for 5 minutes, then transfer to cooling rack.