Preheat the oven to 350 degrees. Line a baking sheet with a silicone baking mat or parchment paper.

To a large mixing bowl, whisk together flour, oats, baking soda and powder, cinnamon, nutmeg, and salt. Combine flax seed meal and water in a small bowl. Set aside for 5 minutes.

To a separate mixing bowl, whisk together the flax egg, melted coconut oil, sugars, molasses, milk, and vanilla. Pour wet mixture into dry. Stir with a spatula or wooden spoon until a soft dough forms. Fold in raisins.

Use a small cookie scoop to distribute dough onto a baking sheet. Slightly press down the cookies with the palm of your hand. Bake for 12 minutes until light golden brown and slightly firm (but still a bit soft) to touch. Let cool for 5 minutes on the baking sheet before transferring to a wire cooling rack.