Add flax seeds to non-dairy milk and set aside.
In a medium saucepan over medium heat, melt coconut oil and add coconut sugar. Stir until a thick paste forms. Remove from heat.
In a large bowl, add all dry ingredients. Then add flax+milk, vanilla extract, and sugar mixture to dry ingredients. Stir with wooden spoon until all ingredients are well incorporated.
Using your hands, spoon out dough to form a ball and place on baking sheet lined with parchment paper or a silicon baking mat. The dough will be very loose, but once you place them on the baking sheet, you can shape them into pretty little circles, roughly 2 inches in diameter. Make sure to place at least 2 inches of space between the cookies, as they will spread in the oven.
Place baking sheet in oven preheated to 350° F for approximately 12-14 minutes. Remove from oven and let them cool for approximately 1 minute. Then, with your spatula or the back of a spoon, reshape the cookies into discs if they've spread into shapeless blobs. Let them cool for a few minutes longer until they've started to harden. Remove them from the baking sheet with a spatula and place them gently onto a cooling rack. Let them cool for ~15 minutes and enjoy.