Review: Jack in the Box - Portabello Mushroom Buttery Jack

Jack in the Box's Portabello Mushroom Buttery Jack features a quarter pound signature beef patty with melted garlic herb butter, Portobello mushrooms, Swiss cheese, peppercorn mayo, grilled onions, and the chain's signature bun.

It goes for $4.99 in my area but I received this courtesy of Jack in the Box.

I've had pretty good experiences with the Buttery Jack line so far and the Portabello Mushroom version was no exception.

The mushrooms were cut thick and contributed a meaty tenderness and robust flavor to the burger. The melted Swiss blanketed the mushrooms and provided a creamy counterpoint.

The onions were caramelized for a nice sweetness but retained a good amount of watery crispness.

The beef was thick and moist with an enjoyable seasoned flavor that was further complemented by a lot of melted butter... maybe too much butter (Le gasp! I know. I can't believe I said that either). My bottom bun was actually soaked with it. So yeah, it was very buttery.

I didn't really notice the peppery quality of the mayo over all the butter.

The bun offered a slightly sweet brioche quality that would probably make for some great French toast. There's a durable and satisfying squish factor to it.

Overall, Jack in the Box's Portabello Mushroom Buttery Jack was really good all around if a bit overly rich due to the butter (not really complaining). Both the mushrooms and Swiss cheese are front and center. Compared to Carl's Jr.'s recently-introduced Mushroom & Swiss All-Natural Burger, I have to tip my hat to Jack's version, which is smaller but comes with a much thicker, meatier patty and better quality mushrooms and Swiss.

Nutritional Info - Jack in the Box Portobello Mushroom Buttery Jack (275g)
Calories - 807 (Calories from Fat - 462)
Fat - 51g (Saturated Fat - 23g)
Sodium - 1081mg
Carbs - 51g (Sugar - 12g)
Protein - 38g