The phrase "chef hats" refers to the tall, white hats that professional chefs wear. They are a traditional symbol of expertise and skill in the culinary world. Full definition
Three chef hats means what we are talking about is really good, and I would make it again, but it may not win any awards for being amazing. (tinaschic.com)
Five chef hats indicates a true gem has been found. (tinaschic.com)
We'll start off the party by decorating chef hats and then it's on to measuring, mixing, and eating. (ahpd.org)