Preheat oven to 350°F.

Prepare baking sheets by lining with parchment paper or silpat mats.

In a small bowl, combine flax seed and 3 tablespoons water. Mix until it is one smooth mixture.

Combine brown sugar and peanut butter in the bowl of a stand mixer (or electric mixer). Beat on medium until well combined. Add flax seed and mix until combined. Add vanilla, baking soda and salt. Beat on medium until combined.

Add remaining water 1 tablespoon at a time, mixing between each addition, until you achieve a nice cookie texture. My mixture takes about 3-4 tablespoons of water.

Scoop dough onto prepared cookie sheet with a 1 tablespoon scoop or using with a heaping teaspoon.

Bake for 8-10 minutes.

Allow to cool on cookie sheet for 3 minutes and transfer to wire rack to cool completely.

Serve and enjoy!