REVIEW: Jack in the Box Portobello Mushroom Buttery Jack

Jack in the Box Portobello Mushroom Buttery Jack

Jack in the Box’s Buttery Jack is much like an ice cream cone on a hot summer day, crab legs at an all you can eat buffet, and baby back ribs at a barbecue joint.

What do these have in common? Besides being foods you’ve seen on your friend’s Instagram that shows EVERYTHING he eats (STOP IT, BRANDON!), they’re also messy enough that you’ll need a few extra napkins if you’re eating them.

The Buttery Jack originally came in two varieties — Classic and Bacon & Swiss. But now there’s a third, the Portobello Mushroom, so get your napkins ready. The burger comes with a 1/4 lb beef patty topped with garlic herb butter, Portobello mushrooms, buttery grilled onions, Swiss cheese, and peppercorn mayo on a gourmet signature bun. So, yeah, it’s basically a mushroom and swiss burger with a fancy name.

If you’re thinking someone’s A-key isn’t working on their keyboard because you thought it was “portabella” not “portobello,” then let me do your Google search for you and say either one is acceptable. So if a Facebook friends corrects you, tell them that they’re wrong, play the instrumentals to Billy Ocean’s “Caribbean Queen,” and then sing the following lyrics:

Spelling bee queen.
Now we’re spelling the same thing.
There are more spellings than one.
No more confusion.

Jack in the Box Portobello Mushroom Buttery Jack 2

Like the plastic wrap Dexter uses to secure his prey, the melted Swiss cheese holds the mushrooms and onions down on the beef patty, preventing them from escaping. My burger came with a decent amount of fungi and aromatics, and they both provided a decent amount of flavor. But to be honest, they don’t taste any different than what’s been on other fast food mushroom and swiss burgers I’ve had.

Although the Portobello mushrooms are in the name, the real star of every Buttery Jack is really the garlic herb butter. As I mentioned in my review of the other varieties, it helps compensate for the patty’s dryness and gives your hands a slick coating that’ll make it easier to slide down fire poles and make Jenga a bit more exciting. The garlic flavor isn’t strong enough to prevent a vampire from invading your personal space, but it does enhance the patty’s flavor.

Jack in the Box Portobello Mushroom Buttery Jack 3

Besides allowing the top bun of the slightly sweet and sturdy gourmet bun to stick to the rest of the burger, I’m not sure about the inclusion of the peppercorn mayo. I didn’t get any pepperiness from the burger. Although, combined with the Swiss cheese, the two did give the burger an added creamy texture. As for the Swiss cheese itself, its mild flavor is hard to detect with the garlic herb butter also hitting my taste buds.

A mushroom and swiss version of Jack in the Box’s Buttery Jack was inevitable. Whenever fast food chains offer a new burger line, it seems mushroom and swiss is almost always one of the options or a later addition (See McDonald’s Sirloin Burger and Angus Third Pounder, Burger King’s Whopper and Big King, Carl’s Jr.’s All-Natural Burger). But the garlic herb butter does help this burger stand out among those others I’ve tried. It’s a good burger, although not as good as the Classic version. And it’s a good addition to the Buttery Jack line.

(Nutrition Facts – 807 calories, 462 calories from fat, 51 grams of fat, 23 grams of saturated fat, 2 grams of trans fat, 128 milligrams of cholesterol, 1081 milligrams of sodium, 51 grams of carbohydrates, 4 grams of fiber, 12 grams of sugar, and 38 grams of protein..)

Item: Jack in the Box Portobello Mushroom Buttery Jack
Purchased Price: $9.27* (large combo)
Size: N/A
Purchased at: Jack in the Box
Rating: 7 out of 10
Pros: Garlic herb butter helps hide the dry patty and makes this burger stand out among other mushroom and swiss burgers I’ve had. Gourmet signature bun is still great. Swiss cheese helps prevent mushrooms and onions from falling out.
Cons: Messy. Hard to notice the Swiss cheese and peppercorn mayo. Predictable burger variety.

*Because I live on a rock in the middle of the Pacific Ocean, things are a bit pricier here. You’ll probably pay less than I did.

6 thoughts on “REVIEW: Jack in the Box Portobello Mushroom Buttery Jack

  1. But if you don’t get the mayo (like on the one I bought) the burger is very dry and not messy at all. Maybe next time I will get one as advertised.

  2. Jack, your Portobello swiss jack is unbelieveably good and we get them often but here in Tucson a lot of your stores putting the sandwich out just swimming is the mushroom juice which makes the buns mushy and I always have to ask for the juice to be drained from the mushrooms before the sandwich is made. Don’t get me wrong I love the taste of all the flavors it is just too wet unless you ask for the juice to be drained off and if you are driving it makes for a messy meal. I thought you should know. A loyal fan of the new sandwich.

  3. I have had a number of mushroom/swiss burgers from various restaurants, fast food and not, and I find the Portobello and Swiss from Jack in the Box to be the best of all. I do order mine without the onions and will have to try asking for it with the onions drained. My greatest complaint is that the burger alone is about the same as the Ultimate Cheeseburger, the combo price is higher for the portobello/swiss than for the same combo with the Ultimate. Do the fries and drink cost them more when being served with one burger than another?

  4. I seldom went to Jack In The Box until I got a coupon for the Portabella Mushroom burger. My taste buds said WOW! Now I am a regular customer and will be as long as I can get my taste buds treated with these wonderful burgers. The mushrooms, Swiss and buttery garlic is the best burger I’ve had at a fast food restaurant.

  5. The portabella mushroom sandwich just came back to my local Jack in the Box. Great flavor but salty! I looked at the nutritional information and about choked. Over a 1000 MG of salt and don’t get me started on the cholesterol. Would be great if they could tweak it a little!

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