Prairie Fire BBQ, Mercato Metropolitano, Elephant & Castle, London

Excellent, messy, juicy double patty smash burger

Burger source

Mercato Metropolitano London is a sustainable community market; in practical terms, this means it’s a massive half in/half outdoor food court, filled with a myriad of wonderful food stalls including at least three places that serve burgers. And none of the cutlery is single use plastic, hurrah!

Prairie Fire BBQ serves ‘Kansas style BBQ’  founded in 2013 by American Expat in London Michael Gratz; his job titles include ‘founder’, ‘chef’, and ‘Pit Master.’ The philosophy is Kansas style, sauce heavy, smoked meat, or in their own words: the “…slow smoked, sauce heavy Kansas City Style is the apex of the ancient art of cooking with wood. The rub, the char, the smoke ring, the tenderness, the umami, the sauce, the smile and well used napkin define Prairie Fire and the future of European BBQ.”

The order

I have had the PFQ, their signature burger, which is: “two seasoned chuck & rib tip steak patties smashed into diced onion on flattop. Served with melty American cheese, crisp lettuce, tomato, onion & BBQ aioli.”

I had seasoned fries on the side.

The meat of it

The Mercato eating environment is a lot of fun. Noisy, half indoors, half outdoors, all smell, sounds and raucous laughter.

Food is served in paper baskets; the ordering system ‘texted’ me to collect the prepared food hot off the grill and fryer.

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It’s hard to photograph, but there was nothing bad about the appearance. That said, the incredible amounts of sauce meant it was a slippery burger, whilst perfectly stacked, had this been on a plate it would probably have collapsed in moments.

The pickle, to the side, was crisp, sweet and fresh. Very mild on vinegar, it’s a palate cleanser for the main meal.

In cross section…

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Here’s where you can see the structural limitations of the burger; the sauce is so heavy that the burger is slipping apart even as I hold it up for its glamour shot.

That said… looks aren’t everything, and on first bite you get an immediate understanding of the splendour of this burger.

The patties are thin and crisp – 2.5-3oz each, at a guess, the patty smash on a hot (though not the hottest) plate lets them char in their own fat, developing a wonderful texture and flavour – though I didn’t notice the onions they’d apparently been cooked in. Cheese is melted in on the grill, though it’s hard to detect under the BBQ aioli. The salad, too, is somewhat token, lost in the sauce. But none of this is a bad thing.

The incredible umami of the burger, with a faint hint of dry-aged, quality beef funk, is complemented perfectly by the runny sweet aioli, a mild peppery heat, and something like the memory of cheese. The salad is present but provides little more than textural background noise. The bun is soft and pliant, with a lovely crumb but thankfully little sweetness.

It’s pretty glorious, if messy, in all. My only criticism, and it’s a marginal one, is that a hotter grill would have provided even more crunch to the patties (which would have been welcome), and the aioli was just fractionally too heavily laid on.

The fries are ‘seasoned’ fries – a sweet smoked paprika, basically, heavily dusted over salted, thin cut fries. There’s nothing bad about these, though nothing exceptional either; thicker cut potatoes might have provided more natural potato flavour but it wasn’t necessary. The additional BBQ aioli they are served with was possibly a perfect condiment in the context of the meal.

Monkey finger rating

Bun –  4/5
Build – 3/5
Burger – 4/5
Taste –  4/5
Sides – 4/5
Value – 3.5/5 – £12.50 for burger and side – felt a bit toppy in a food market setting, but everything at Mercato is a little pricey.

Burger rating – 4/5 – really good patty smash option. Next time will add bacon for a bit more crunch and request they leave it on the grill a little longer than normal.

The deets

Mercato Metropolitano is a 5 minute walk from Elephant & Castle tube, and 15 minutes from my office in Southwark. Recommended for anyone in the neighbourhood. Find more info on PFQ here.

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