For a buck more from the standard $6.99 of a Tavern Double (includes Bottomless Steak Fries), you can choose to melt your mouth with either Fiery Ghost Style or Cry Baby Style. If you're looking for a bigger burger, it's also a $1 upcharge on the Big Tavern.
Fiery Ghost Style incorporates a ghost pepper sauce and pairs it with fresh and fried jalapenos plus pepper jack cheese for good measure.
Red Robin's Tavern Double comes with two flame-grilled patties, lettuce, and tomato on a sesame seed bun and can already be customized quite a bit beyond the burger "styles." Other available Tavern Double styles include the Pig Out, Cantina Jack, and Buzzalo. They're all available for a limited-time at Red Robin.