Preheat the oven to 350°F or 180°C.
In a medium bowl, combine almond flour, sweetener, and baking powder.
In a separate bowl, mix the wet ingredients - melted butter, lemon zest, vanilla, and egg.
Now, combine the wet ingredients to the dry ingredients. Stir well until a dough forms. You can also use an electric hand mixer.
Form a dough ball and place it onto a baking pan lined with parchment paper. Flatten into a disc shape with a rolling pin, about 1 inch thick. Using a cookie cutter, cut out 5-6 scones. Place them apart from each other. Then brush the tops with beaten egg.
Bake for 18-22 minutes until golden. Let cool completely in the baking pan. These scones may break when hot, but they firm up once they are cooled down.