Stir almond flour, sweetener, and salt together in a bowl. Add melted butter and vanilla, then mix until a crumbly dough forms that holds when pressed.

Preheat oven to 350°F (175°C). Scoop tablespoon-sized dough balls onto a parchment-lined sheet, flatten to ½ inch thick, and bake 12 to 14 minutes until edges are golden.

Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely before serving.