01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - In a medium bowl, whisk together almond flour, cocoa powder, baking soda, and fine sea salt until evenly blended.
03 - In a large bowl, combine melted butter and erythritol. Whisk in the egg and vanilla extract until smooth and well incorporated.
04 - Stir the dry ingredients into the wet mixture until just combined. Fold in the dark chocolate chips, being careful not to overmix.
05 - Scoop tablespoon-sized mounds of dough onto the prepared baking sheet, spacing them about 2 inches apart. Flatten each cookie slightly with the back of a spoon, as keto cookies do not spread much during baking.
06 - Sprinkle a pinch of flaky sea salt on top of each cookie for enhanced flavor contrast.
07 - Bake for 10-12 minutes, or until edges are set and centers look slightly underbaked. The cookies will continue to firm as they cool.
08 - Cool on the baking sheet for 10 minutes, then transfer to a wire rack to cool completely before serving.