Combine flour, salt and baking powder in a large mixing bowl. Set aside.
In a small microwaveable bowl, heat peanut butter in microwave for about 45 seconds or until soft.
Stir in brown sugar and soy milk, adding enough soy milk to have a pretty milky consistency.
Pour the peanut butter mixture immediately into the mixing bowl containing the dry ingredients.
Mix until slightly moist. Add rolled oats. Continue mixing until well combined, you may have to add more soy milk as this batter will be thick. Drop by spoonfuls onto cookie sheet. Bake about 10 minutes.