In a mixing bowl, blend the almond flour, coconut flour, tapioca flour, and sea salt. Add the shortening or butter—this can be done by hand, but using an electric mixer or food processor makes the process easier. Once combined, mix in the sugar, plant-based milk, and maple syrup until a soft dough forms. Chill the dough in the freezer for 10-15 minutes to make it easier to handle.