This huge cookies were a huge it in my household and I know they'll be in yours too!
Preheat your oven to 350 degrees F. Prepare a jumbo muffin tin with cooking spray or silicone molds. Set aside.
With an electric mixture, whisk together the flax egg, peanut butter, melted coconut oil, coconut sugar and vanilla until fully combined. About 2-3 minutes.
Add the rest of the ingredients including the walnuts (if using) but excluding the chocolate chips. Whisk together until the wet ingredients and the dry ingredients are fully combined.
Divide the mixture into 5 equal parts into your prepared muffin tin. Top with the chocolate chips and press down slightly.
Bake for 25-30 minutes. Mine took about 26 minutes. Let cool completely before pulling them out of their molds!