A Florida pistillate is suing the makers of Velveeta Shells and Cheese, claiming the crockery takes excessively agelong to make.
The Kraft Company markets its microwaveable cups arsenic "ready successful 3.5 minutes", but Amanda Ramirez says it takes longer.
The $5m (£4.2m) suit claims the clip advertised does not see mentation clip - opening the lid and condiment pouch, earlier adding h2o and stirring.
Kraft Heinz Foods Company described the suit arsenic "frivolous".
"We are alert of this frivolous suit and volition powerfully support against the allegations successful the complaint," a institution spokesperson told the BBC.
In the lawsuit, which was filed successful a Florida tribunal past month, Ms Ramirez's lawyers assertion she paid much than she would person had she known the truth.
The suit besides asks the institution to "cease its deceptive advertising" and "be made to prosecute successful a corrective advertizing campaign".
It is not the archetypal clip a US lawsuit has sued a institution implicit mendacious advertising.
Earlier this year, a New York antheral filed a suit against McDonald's alleging their adverts made their burgers look overmuch bigger than they really were.
The suit said the burgers successful the selling were astatine slightest 15% larger than they were successful existent life. It included immoderate of the reactions connected societal media calling retired the firms for the discrepancy.
Rival Burger King was deed with a akin suit successful Florida successful March.