Toasted Coconut Porter

I am extract brewing from a kit, 5 gal.  Want to add toasted coconut. Looking for suggestions of when and how much?  Thanks

i ad to keg in a bag when i’ve done it. go easy like around .5-.75 cup …its very potent and monitor it daily so you can pull it as soon as you get the amount you want.  first time i used flaked coconut i left it too long and had a coconut bomb.