The brownies may seem small but they pack a punch...if you have only smoked before, and have never eaten, it takes around an hour before the effects take hold, and they will last quite a while...I would start with about 1/4 to 1/3 and wait to see what happens...you can always eat more, but you can't un-eat it...for me, one piece is too much...they will usually tell you at purchase not to eat the whole thing...be cautious and enjoy