Sorachi onion soup

French onion soup with IPA – that was the idea that leapt into my head one afternoon, whilst daydreaming at work.  Not French onion soup accompanied by IPA – I mean with the beer in the soup, as part of the broth. There’s nothing new, of course, and as I googled the term I discovered I’m not the first to have the idea. But I did come up with a twist that I figured was worth a try – what if I was to use a single hop Sorachi Ace IPA? It’s an unusual and divisive hop that, to me, is a big burst of citrus (lemon and clementine) with a herbal edge which recalls dill. The fruitiness will match the tang of the cheese toasts which sit, oozing on top of the broth, whilst that savoury element is a natural partner for the herbs in the soup.

Beers showcasing Sorachi Ace aren't as unusual as they used to be, though they tend to stick to the saison style (the eponymous examplefrom Brooklyn Brewery, Wild Beer’s Epic Saison, or Adnams' version for Marks & Spencer – all great beers). The only beer I've come across that fits the bill is Weird Beard’s Sorachi Face Plant, so that’s what I'm using here.

As a guide, I referred to Felicity Cloake’s ‘perfect’ French onion soup recipe, making certain changes where necessary. I'm not using any cider or brandy, as I don’t want to confuse the flavour of the beer, and I'm using vegetable stock in place of beef, as I don’t eat meat. I'm also using cheddar cheese for my toasts – not very French, I know, but I love cheddar with sweet onions and I think it’s a perfect foil for hop bitterness.

The Ginger Pig, whose recipe I initially found, suggested that the chosen beer shouldn't be “too gutsy”. This is clearly not the case for the 8.6% beast I'm using. There is a lingering, boozy bitterness in the finished dish but, I would suggest, no more than there would have been had I added a nip of brandy at the last moment, as many recipes suggest. To me, it isn't too much, especially in combination with the cheese toasts, and a taste of the beer on the side pulls everything together beautifully. If you don’t want this bitterness, something like Adnams' Marks & Spencer saison, or Bristol Beer Factory’s Sorachi, a more subtle golden ale, might make a good substitute.

This recipe takes time, but it’s not labour intensive – most of the time, you can be elsewhere while the dish cooks.

INGREDIENTS (makes 2 small, starter-sized portions or one main course)

80g butter

5 onions (based on the medium-sized ones in a kilogram bag)

1 tsp plain flour

1 tsp balsamic vinegar

Pinch of dried thyme

1 bay leaf

300ml vegetable stock

200ml beer (Sorachi Face Plant or other Sorachi Ace beer)

1 tsp sugar

6 medium-thick slices of baguette

Grated cheddar cheese

METHOD

First, prepare the onions by peeling, halving and finely slicing.

Melt the butter in a large pan over a low to medium heat. When it’s melted, add the onions. Fry for a few minutes, then sprinkle with a generous pinch of salt. Stir frequently for about 10 minutes, until they begin to become soft and translucent.

Stir in the thyme and bay leaf, then turn the heat right down and put a lid on the pan. This will retain the moisture and help the onions to soften and caramelise quicker. They’ll still need at least an hour – 90 minutes if possible – until they’re a rich caramel colour.

Add the flour to the pan and stir for a minute or so. Now add the vinegar and roughly half of the beer along with the vegetable stock. If your flour has gone lumpy, you may need to use a whisk at this point. Simmer the broth for around another hour until it has significantly reduced, which will allow for the addition of the remaining beer at the last moment.

While the soup reduces, heat the grill and toast your baguette slices on both sides. Set these aside. Grate as much cheese as you dare to top the toasts later.

When the soup is looking thicker, heat the grill again, ready to grill the cheese toasts when the soup if finished.

Add a teaspoon of sugar to the broth, which will counteract some of the bitterness in the beer. Check the seasoning, and then stir in the remaining beer. Keep the heat very low, and stir just long enough to heat, but not reduce any further.

Ladle the soup into bowls. Top with the toasted baguette slices, then cover in grated cheese. Place the bowls under the grill until the cheese is melted and bubbling.

Serve, ideally with a glass of the same beer you used to cook as an accompaniment.