I tried grilled cheese sandwiches from Sonic, Shake Shack, and Five Guys. My favorite was also the least expensive.

I tried grilled cheese sandwiches from Sonic, Shake Shack, and Five Guys. My favorite was also the least expensive.

I ordered grilled cheese sandwiches at Five Guys, Shake Shack, and Sonic.Steven JohnI tried grilled cheese sandwiches from Sonic, Shake Shack, and Five Guys.The sandwich from Shake Shack seemed small, and I thought the option from Five Guys was overpriced.Sonic's grilled cheese sandwich was my favorite for overall value.A grilled cheese sandwich is one of the ultimate comfort foods. And although it's a simple meal to make at home, I was curious …