Gather all your ingredients and equipment. Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the superfine almond flour, ground cinnamon, and sea salt. Stir until well blended.
In a separate bowl, whisk together the melted coconut oil, pure maple syrup, and vanilla extract. Ensure everything is combined smoothly.
Pour the wet ingredients into the dry mixture, along with the lemon or orange zest. Mix well until a dough forms. If the dough is too crumbly, you can add a little more melted coconut oil.
Using your hands, form the dough into a disc shape. Optionally, roll out the dough between two sheets of parchment paper to about 1/4 inch thick. Cut into desired shapes using a cookie cutter, or simply slice into squares.
Place the shapes on the prepared baking sheet and bake in the preheated oven for about 12-15 minutes, or until the edges are lightly golden.
Remove the cookies from the oven and allow them to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Enjoy your Make-Ahead 3-Ingredient Paleo Shortbread with a warm beverage or as a quick snack!