Classic Welsh Rarebit
A gloriously cheesy, savoury sauce slathered over thick buttered toast and finished under the grill until bubbling and golden — proper Welsh rarebit. Rich, slightly tangy, with a whisper of ale and mustard to cut through the cheese.
Welsh rarebit is not just posh cheese on toast — it's a proper saucy ritual. A tangy, mustard- and Worcestershire-brushed cheese sauce is the thing that lifts ordinary bread into something gloriously indulgent. Make this when you want fast comfort food with a bit of swagger: weekend brunch, late-night supper, or when you’ve got guests who appreciate cheese that’s been given the star treatment. The ale and mustard give the sauce a savoury lift; the egg yolk makes it silk — perfect for dunking.
Ingredients
- 250 g mature cheddar, coarsely grated
- 50 g unsalted butter — divided — 25g for the sauce, 25g to butter the bread
- 15 ml plain (all-purpose) flour
- 75 ml English ale or beer — or milk if you prefer non-alcoholic
- 15 ml Worcestershire sauce — traditional; contains anchovy in most brands
- 5 ml English mustard powder — or 1 tsp Dijon mustard
- 2 egg yolks — room temperature
- 0 ml smoked paprika — optional
- 5 ml freshly ground black pepper — to taste
- 4 slices thick-sliced white or sourdough bread — about 2 cm / 3/4 in thick
- 0 ml sea salt — or to taste
- 15 ml chives or flat-leaf parsley, finely chopped — for garnish
Equipment
- small heavy-based saucepan
- whisk
- grater
- baking tray
- oven grill (broiler)
Instructions
Grate the cheddar and separate the two egg yolks into a small bowl. Put the grated cheese and yolks to one side. Butter both sides of each slice of bread with about half of the reserved butter (roughly 25g total).
Preheat the oven grill (broiler) to high and place a rack about 10–12 cm (4–5 in) from the element. Place the buttered slices on a baking tray and toast under the grill until lightly golden on both sides (about 1–2 minutes per side) — you want sturdy, warm toast, not charred. Remove from oven and keep warm.
In a small heavy-based saucepan over medium heat, melt 25g of the butter. Sprinkle in the flour and stir constantly to make a pale roux — cook for 1–2 minutes until the raw flour smell disappears but it does not brown.
Slowly add the ale (or milk) in a steady stream, whisking constantly to avoid lumps. Once combined, bring to a gentle simmer and let it thicken for 1–2 minutes.
Reduce the heat to low. Add the grated cheddar a handful at a time, stirring until fully melted and the sauce is smooth. Add the Worcestershire sauce, mustard powder, smoked paprika (if using), salt and black pepper. Taste and adjust seasoning.
Tempering the yolks: remove the pan from direct heat. Whisk about 1–2 tablespoons of the hot cheese sauce into the egg yolks to warm them, then quickly pour the tempered yolks back into the saucepan, whisking constantly to combine. Return to very low heat just to thicken for 30–60 seconds — do not boil.
Spoon an even layer of the cheese sauce over each toasted bread slice (use all the sauce). Scatter extra grated cheddar on top if you like a thicker crust.
Return the tray to the preheated grill and cook for 2–4 minutes until the topping is bubbling and has deep golden-brown spots. If you prefer a brûléed finish, briefly blast with a handheld blowtorch.
Remove from the grill, scatter over the chopped chives or parsley and serve immediately while hot and gooey.
Tips
- Use a mature, flavoursome cheddar — it melts well and gives the sauce the depth a Welsh rarebit deserves.
- Temper the egg yolks: whisk a spoonful of hot sauce into the yolks before adding them to the pan to avoid scrambled bits.
- Toast the bread to be nicely firm so it holds the rich sauce without going soggy; thicker slices are your friend.
- Make the cheese sauce ahead and rewarm gently over low heat, whisking in a splash of milk or ale if it tightens up — never overheat.
- If you can, use an ale rather than water — it adds savoury complexity. For a non-alcoholic version, use warm milk with a teaspoon of apple cider vinegar for brightness.
Substitutions
English ale or beer → milk (same quantity), or vegetable stock for extra savouriness
Stays closeWorcestershire sauce → 1 tsp soy sauce + 1 tsp malt vinegar (for a vegetarian Worcestershire-style flavour)
Stays closeMature cheddar → a mix of cheddar and Gruyère (use 150g cheddar + 100g Gruyère)
Stays closeThick-sliced white bread → sourdough or rye bread
Noticeably different
Nutrition
Per serving · estimated
- 460
- Calories
- 20 g
- Protein
- 17 g
- Carbs
- 38 g
- Fat
- 2 g
- Fibre
- 4 g
- Sugar
- 600 mg
- Sodium
FAQ
Can I make the cheese sauce ahead of time?
Yes — make the sauce, cool, cover and refrigerate for up to 24 hours. Reheat gently over low heat, stirring and thinning with a splash of milk or ale before spreading on the toast.
I don’t want to use raw egg yolks — can I skip them?
You can skip the yolks; the sauce will be less glossy and slightly less rich. Add an extra tablespoon of butter and a splash more ale/milk to compensate.
My sauce split/is greasy — what went wrong?
Usually overheating or too-rapid cooking. Keep the heat low when melting the cheese and after adding the yolks; if it splits, whisk in a tablespoon of hot water or milk off the heat to bring it back together.
How can I make this vegetarian?
Use a vegetarian Worcestershire sauce (many brands make anchovy-free versions) or replace it with soy sauce + malt vinegar as suggested in substitutions.
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