Preheat oven to 180 C temp. Line a baking sheet with parchment paper.
In a big bowl, mix together flax seed and water. Let sit for a few minutes.
Add the coconut oil, maple syrup, vanilla extract, milk. Whisk until smooth.
Add the oatmeal, flour, salt, baking powder. Mix until combined. Incorporate chocolate chips into a dough.
Using spoon or hands, shape small balls. Push them gently until form a cookie. Bake about 11-13 min.