Preheat the oven to 350ºF. Line your baking sheet with parchment paper or a silicone baking mat.
Combine the flaxseed and water and set aside for 5 minutes.
In a small bowl, whisk together the coconut oil, peanut butter, and brown sugar until fluffy. Add in the flax egg and vanilla, and whisk until combined.
Mix in the flour, oats, peanut powder, baking soda, and salt.
Fold in the chocolate chips, and candies, saving some of the candy to decorate the tops when they come out of the oven.
This recipe can make 1 massive cookie, 2 large cookies, 4 medium cookies, or 6 small cookies.
For 1 massive gooey cookie, bake for 15 minutes. For 2 large gooey cookies, bake for 12 minutes. For 4 medium cookies, bake for 10 minutes. You can adjust the time depending on how done you want the middles.