The Martha Marcy May Marlene star – and foodie – enjoyed the festival by mixing and mingling with chefs and guests.
"I was able to meet so many great chefs … Bobby Flay even made me a burger," Olsen told PEOPLE.
After tasting the burger, Olsen gave Flay a thumbs up.
Looks like she's got good taste – Flay's green chile burger won the Amstel Light People's Choice Award.
– Liza Hamm