Fries with That is a sitcom about the hilarious antics of a group of teens who run havoc running a fast food joint. Pattie, Robyn, Tess and Alex are way too concerned with friends, dating, body image, and the in-crowd to bother much with actually working. All the while, the assistant manager Ben is going nuts trying to get them to flip burgers and actually serve customers.
Profits are down and Ben must fire an employee to reduce overhead. After conducting an efficiency study to determine who is expendable, it turns out Ben is the one who is expendable. So, like a good Assistant Manager, Ben fires himself.
Much to her chagrin, Robyn finds out that she is going to have to wear big metal braces. Once in place, she refuses to open her mouth, instead choosing to converse with friends and customers through body language and hand-written signs.
Pattie organizes a baseball game between Bulky's and their rival restaurant, Chunky's. As Coach, Patti discovers that the only time for practice is during working hours, so the gang figures out how to practice and serve the customers.
Robyn is forced to take over as Assistant Manager and hates the new role. Pattie sees Robyn's new role as a bonus, believing they can all goof off now that one of their own has become the boss. Robyn, however, takes her new job seriously.
Desperate to join the Goodfellows Guild at school, Pattie sets up an interview with the club President after school at Bulky's on a day that just so happens to coincide with a day that Ben decrees everyone must look and behave like Alex.
He might hate it, but Alex wants to keep his job at Bulky's. However, his tenure is on thin ice, and on the verge of being terminated, when Ben hires a champion burger flipper to show Alex that he means business.
Alex wins a competition to be Bulky's spokesperson and gets right to work creating a new ad campaign. The success soon goes straight to Alex's head, and the campaign ends up turning into a full-scale disaster.
Ben buys an aromatic spray at a pet store hoping to stun a pesky mouse long enough to get it out of the restaurant, but his plan goes horribly awry when the staff, not the mouse, are affected by the spray, but in a way no one expects.
Pattie and Tess run against each other for President of the Student Council but end up spending more time campaigning than working. Customer dissatisfaction turns into satisfaction, however, when Pattie begins buying votes with free food.
Pattie develops a crush on John Smith, a man who claims he was sent from Bulky's head office to catch a counterfeiter. However, it soon becomes clear that John Smith is not who he claims but is instead nothing but a common thief himself.