Enjoy the great-tasting items available at Burger King restaurant nationwide. Burger King flame-broils their burgers to perfection. Next time you're at Burger King, order a flame-broiled Whopper Sandwich. The grill marks are there, just like when you BBQ at home. The Fresh Flame-broiled taste of Burger King is right around the corner. The BK Crown Card is redeemable at over 8,000 Burger King restaurants in the US. They can be used towards the Burer King menu anytime - Breakfast, Lunch or Dinner. BK Crown Cards are not redeemable at university, airport, mall, or military base locations.