The Blackstone 1554 was our favorite when we tested griddles and flat-top grills. It’s got the size and BTUs to cook for a large group, but it’s versatile enough to scale that down to cooking for two.

Griddles come in a range of sizes, from one that fits in the palm of your hand to ones large enough to feed a gaggle of brunch guests. “If you’re thinking of cooking for the whole family ...