"The family was very low-key and cordial," says an onlooker
Credit: Kevin Winter/Getty

Burgers, fries and floats, oh my.

After tearing up the Superbowl, Beyoncé, Ja -Z and their 4-year-old daughter Blue Ivy returned back home to Los Angeles, where they indulged in some comfort food.

On Monday, the superstar couple was spotted having lunch at Plan Check Sawtelle in L.A. While mom and dad dug into Plan Check burgers and Beef Tallow Fries, Blue Ivy enjoyed a Jr. Grilled Cheese.

The family shared Cruller Donuts and “was very low-key and cordial with staff and other diners,” says an onlooker. “They had a very enjoyable lunch.”

While Beyoncé was performing during the halftime show with Coldplay, Blue Ivy snuggled up with the singer’s close pal Gwyneth Paltrow in a private box at Levi’s stadium.

The family stayed in a $10,000 a night Airbnb for the weekend, and Beyoncé and Jay-Z were spotted dancing up a storm at a private after party. “They were super cute dancing and having a really good time,” said a source.