It cost $3.99 at my local Burger King.
The turkey patty comes in at a good thickness and looks to be about a quarter of a pound. There are some nice grilled marks that add a little charred flavor. The turkey is ground very finely and the result is a mouth feel similar to a giant Chicken McNugget. On the plus side, it's juicy. But, where a beef patty tends to taste like beef, and a chicken filet tastes like chicken, a turkey patty doesn't really taste like turkey to me. It just tastes like meat, but I couldn't point to a specific animal of origin by its flavor.
The overriding flavor for my particular Turkey Burger was ketchup as who ever made it went a little crazy with the ketchup squeeze bottle. That coupled with the turkey patty's faint flavor made for a mostly sweet and tangy burger, but not in a good way... unless you really like eating ketchup... out of a packet.
I didn't really taste the onions much nor the mayo and lettuce. It was just all very ketchup-y.
I like BK's artisan-style bun. It's denser than the typical burger bun but still relaxingly soft. It also has a nice touch of sweetness.
Overall, I was hoping for a bit more flavor from BK's turkey patty and less ketchup. I ended up scraping off a lot of it, but it still ended up being fairly ketchup-y. If you're looking to try Burger King's Turkey Burger, I suggest asking for the ketchup on the side. Even taking into account the excessive ketchup, it was a pretty ho-hum experience for me.
Nutritional Info - Burger King Turkey Burger (252g)
Calories - 530 (from Fat - 240)
Fat - 26g (Saturated Fat - 5g)
Sodium - 1210mg
Carbs - 46g (Sugar - 11g)
Protein - 27g