Smartfood popcorn has come a long way from its ubiquitous white cheddar flavor. We tasted eight of the brand's current offerings to see which was best.

Sweet and Spicy Popcorn: Add 1 tablespoon hazelnut oil (optional) to the oil before popping the corn. Transfer the popped popcorn to a big bowl and toss with salt to taste, 1 teaspoon sugar and 1/ ...