I tried and ranked every shake at Shake Shack. A classic earned the No. 1 spot.

Tech Insider : Business
Four flavors of Shake Shack shakes.
Four flavors of Shake Shack shakes.

Gabbi Shaw/Business Insider

I ordered the same meal at Freddy's and Portillo's. As a Chicago local, I was shocked by the winning restaurant.

Tech Insider : Business, Style
The author's meal at Portillo's; a vanilla milkshake, chili cheese dog, and chicken tenders.
I ordered the same meal — a vanilla milkshake, chili cheese dog, and chicken tenders — at Freddy's and Portillo's.

Annabel Rocha

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