(TrendHunter.com) Jimmy John's may be best known for its sub sandwiches, but now the chain is bolstering its dessert menu with the addition of a new Fudge Chocolate Brownie. A permanent addition to the Jimmy... (TrendHunter.com) Jimmy John's may be best known for its sub sandwiches, but now the chain is bolstering its dessert menu with the addition of a new Fudge Chocolate Brownie. A permanent addition to the Jimmy...