First, preheat the oven to 325° Fahrenheit. Line two cookie sheets with parchment paper and grease with cooking spray or butter. Then, in a large bowl, using an electric mixer, beat the butter, brown sugar, and sugar until smooth and lighter. Add the eggs, vanilla, and peanut butter and beat to combine. Then add the flaxseed meal, flour, arrowroot starch, almond flour, baking powder, and salt and stir with a spatula until completely combined. Finally, add in two cups of the peanut M&Ms and chopped peanuts and stir to combine.