Preheat and prep: Heat your oven to 350°F (175°C).
Line a baking sheet with parchment paper or a silicone mat.
Mix dry ingredients: In a medium bowl, whisk almond flour, coconut flour, protein powder, erythritol (or allulose), baking powder, salt, and cinnamon until evenly combined and lump-free.
Whisk wet ingredients: In a separate bowl, whisk the egg, melted oil, vanilla, and maple extract. Add 3 tablespoons almond milk to start.
Combine: Pour the wet mixture into the dry. Stir with a spatula until a thick dough forms.
If it’s crumbly, add almond milk 1 tablespoon at a time. You want a soft, scoopable dough, not runny.
Taste and adjust: Briefly taste the dough. If you want a stronger maple note, add another 1/4 to 1/2 teaspoon maple extract.
If it’s too sweet, a tiny pinch of extra salt balances it.
Portion: Scoop 10–12 mounds (about 2 tablespoons each) onto the baking sheet. Gently flatten to 1/2-inch thick; they won’t spread much.
Add toppings (optional): Press chocolate chips or chopped pecans lightly into the tops. A pinch of flaky salt is great here too.
Bake: Bake for 9–12 minutes, until edges are lightly golden and centers look just set.
Do not overbake; they firm up as they cool.
Cool: Let cookies cool on the sheet for 5 minutes, then transfer to a rack to cool completely. This step helps them hold together.
Enjoy: Serve slightly warm or at room temperature. For extra maple aroma, you can brush the tops with a few drops of maple extract diluted in almond milk.