Preheat and prep: Heat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
Mix dry ingredients: In a bowl, whisk almond flour, sweetener, baking powder, and salt until evenly combined.
Add wet ingredients: Stir in melted butter, egg, and vanilla. Mix until a soft dough forms.
If it’s crumbly, add almond milk 1 teaspoon at a time.
Fold in extras (optional): Add sugar-free chocolate chips or chopped nuts for texture.
Portion the dough: Scoop 1½-tablespoon portions onto the lined sheet, spacing them about 2 inches apart. Roll gently into balls, then press to about 1/3-inch thick.
Bake: Bake for 9–12 minutes, until edges are set and lightly golden. The centers should still look a touch soft.
Cool completely: Let cookies cool on the pan for 10 minutes, then move to a rack.
They firm up as they cool.