Mix gluten-free flour, almond flour, coconut sugar, and salt in a bowl, then add coconut oil and vanilla to form a dough.Add plant-based milk if needed until dough holds together.Chill dough for 20–30 minutes in the refrigerator.Preheat oven to 325°F (165°C) and line a baking sheet with parchment paper.Roll out dough and cut into shapes or squares.Bake for 10–12 minutes until edges are lightly golden.Cool on baking sheet for 5 minutes, then transfer to a wire rack to finish cooling.