Food as goal treats sets a bad precedent..
If you lose 2lbs -and at your current weight that's significant - yu have a food treat - and you migh just see a difference in the scale again - doesnt mean you gained fat -just that tehre was a scale difference - a lot of people can't deal witht hat well.
Better goal rewards are bottles of nail polish, a manicure, a magazine, a treat for your body/mind/spirit - something you'd really enjoy -but not food...
food should be a part of your day -not a reward...