Prep the oven and pan: Heat the oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone mat.
Mix dry ingredients: In a bowl, whisk 2 cups super-fine almond flour, 1 tablespoon coconut flour, 1 teaspoon baking powder, and 1/2 teaspoon salt until well combined.
Cream the butter and sweetener: In a separate large bowl, beat 1/2 cup softened unsalted butter with 1/2 cup granular keto sweetener and 2 tablespoons brown-style keto sweetener (optional) until light and fluffy, about 1–2 minutes.
Add egg and vanilla: Beat in 1 large egg and 2 teaspoons vanilla extract until smooth. Scrape down the sides of the bowl.
Combine wet and dry: Add the dry mixture to the wet ingredients.
Stir until a soft dough forms. It should be thick but pliable.
Fold in chocolate: Gently fold in 1/2 to 3/4 cup sugar-free chocolate chips. Add 1/4 cup chopped nuts if you like.
Portion the dough: Scoop 1.5-tablespoon mounds onto the baking sheet, spacing them a couple of inches apart.
Lightly flatten the tops with your fingertips; keto dough doesn’t spread as much.
Bake: Bake 9–12 minutes, until the edges are lightly golden and the centers look set but still soft. Do not overbake—carryover heat will finish the job.
Cool: Let cookies cool on the sheet for 10 minutes to firm up, then transfer to a rack to cool completely. They’ll crisp slightly as they cool.
Enjoy: Serve warm or at room temp.
If you want extra “fresh from the oven” feel later, microwave for 5–10 seconds.