It features a spicy breaded chicken filet with ghost pepper ranch sauce, grilled onions, jalapenos, Swiss-style cheese, lettuce, and tomatoes, on a sesame seed bun.
There's also a new bacon version that nixes the lettuce and tomatoes for hickory-smoked bacon.
You can find the sandwich at participating Jack in the Box restaurants through the end of May. The original Blazin' Chicken carries a suggested price of $3.99, while the bacon version goes for $4.49 (may vary).
You can find my review of the sandwich here.