Preheat the oven. Set to 350°F (175°C). Line a baking sheet with parchment paper to prevent sticking.
Cream the butter and sweetener. In a bowl, beat softened butter with the sweetener until light and fluffy, about 1–2 minutes.
This helps create a tender texture.
Add the egg and vanilla. Mix until well combined. Scrape down the sides so everything incorporates.
Combine the dry ingredients. In a separate bowl, whisk almond flour, baking soda, and salt to break up any lumps.
Bring the dough together. Add dry ingredients to the wet ingredients and mix until a soft dough forms. If it looks too crumbly, add 1 tablespoon of almond milk at a time until it holds together.
Fold in chocolate chips. Stir in the sugar-free chocolate chips and any optional nuts or spices.
Scoop and shape. Use a tablespoon or cookie scoop to portion the dough into 1 1/2-inch balls.
Place on the baking sheet and gently flatten to about 1/2-inch thick; almond flour cookies don’t spread much.
Bake. Bake for 9–12 minutes, until the edges are lightly golden. The centers should still look soft.
Cool. Let the cookies cool on the baking sheet for 10 minutes before moving them. They firm up as they cool.
Finish and serve. If you like, sprinkle with a pinch of flaky sea salt.
Enjoy warm or at room temperature.