Welsh Rarebit Recipe with Low Fat Cheese Sauce on Wholegrain Toast
Welsh rarebit is one of those dishes that feels like a warm hug on a cold morning. Traditionally it is a gloriously indulgent cheese sauce poured over toast and grilled until bubbling, but the classic version can be heavy on saturated fat and calories. This healthier take keeps every bit of the comfort and bold flavour while using a clever low fat cheese sauce that still tastes deeply satisfying. It is the kind of breakfast that proves eating well does not mean eating bland.
The secret to making this welsh rarebit recipe with low fat cheese sauce actually taste like the real thing comes down to a few smart swaps and some flavour-building tricks. Reduced fat mature cheddar is used instead of full fat because the strong, sharp flavour means you need less of it to get that punchy cheese hit. A small amount of cornflour thickens the sauce without needing a butter-heavy roux, and skimmed milk keeps the base light. Worcestershire sauce, dry mustard powder and a pinch of smoked paprika add layers of depth that make this sauce taste far more complex than its ingredient list suggests. The result is a velvety, golden sauce that coats the back of a spoon beautifully.
For the toast, swapping white bread for thick-cut wholegrain or seeded bread adds a meaningful amount of fibre and keeps you fuller for much longer. Each serving gives you over 20 grams of protein, thanks to the combination of egg yolk stirred into the sauce and a poached egg served alongside. That protein hit makes this far more than just cheese on toast. It is a genuinely sustaining breakfast that can take you through a busy morning without the mid-morning slump. Adding sliced tomatoes on the side brings a fresh acidity that cuts through the richness of the sauce and bumps up your vegetable intake before 9am, which is always a win.
This recipe is quick enough for a weekday morning if you prep the sauce the night before, and impressive enough to serve at a weekend brunch. The sauce reheats beautifully with a splash of milk stirred in, so you can make a batch and use it across two or three mornings. It is naturally high in calcium, a good source of B vitamins from the eggs and wholegrain bread, and far lower in saturated fat than any traditional version you will find. If you have never tried making your own Welsh rarebit at home, this lighter version is the ideal place to start. You might find it becomes a permanent fixture in your breakfast rotation.
Ingredients
- 120 g reduced fat mature cheddar (grated, at least 30% less fat variety)
- 180 ml skimmed milk
- 1 tsp cornflour (mixed with 1 tbsp cold water to form a slurry)
- 1 large egg yolk (free range)
- 1 tsp Worcestershire sauce (check label for vegetarian if needed)
- 1 tsp dry mustard powder
- 0.3 tsp smoked paprika
- 1 pinch cayenne pepper (optional, for a gentle heat)
- 2 thick slices wholegrain or seeded bread (around 80g total)
- 2 large eggs (free range, for poaching)
- 1 tsp white wine vinegar (for poaching water)
- 2 medium ripe tomatoes (sliced, to serve)
- 1 small handful fresh chives (finely chopped, to garnish)
- 1 pinch flaky sea salt (to taste)
- 1 pinch black pepper (freshly ground)
Instructions
- 1
Pour the skimmed milk into a small non-stick saucepan and place over a medium-low heat. Warm it gently until it is just steaming but not simmering. Whisk in the dry mustard powder, smoked paprika, cayenne pepper if using, and the Worcestershire sauce.
Do not let the milk boil at this stage. Keeping it at a gentle heat prevents the sauce from splitting later.
- 2
Stir the cornflour slurry once more to recombine it, then pour it into the warm milk mixture while whisking constantly. Continue to whisk over medium-low heat for about 2 minutes until the sauce thickens enough to coat the back of a spoon.
Keep stirring throughout. Stopping even briefly can cause lumps to form.
- 3
Remove the pan from the heat. Add the grated reduced fat cheddar a handful at a time, stirring well between each addition until fully melted and smooth. Once all the cheese is incorporated, whisk in the egg yolk quickly. Season with a small pinch of salt and black pepper.
Taking the pan off the heat before adding the cheese and egg yolk prevents the sauce from becoming grainy or scrambling.
- 4
Preheat your grill to a high setting. Place the wholegrain bread slices on a baking tray and toast one side under the grill for about 2 minutes until lightly golden. Flip them over and toast the other side for 1 minute, leaving it slightly less done as this side will go back under the grill.
Toasting both sides first stops the bread from going soggy when the sauce is added.
- 5
Spoon the low fat cheese sauce generously over the less toasted side of each bread slice, spreading it right to the edges. Place the tray back under the hot grill for 3 to 4 minutes until the sauce is bubbling, golden and just starting to catch in spots.
Watch the grill closely during this step. The sauce can go from golden to burnt quite quickly.
- 6
While the rarebit is grilling, bring a medium saucepan of water to a gentle simmer and add the white wine vinegar. Crack each egg into a small cup individually. Create a gentle swirl in the water with a spoon, then slide each egg in carefully. Poach for 3 minutes for a runny yolk or 4 minutes for a firmer set.
Using fresh eggs gives you the neatest poached eggs as the whites hold together much better.
- 7
Remove the rarebit toasts from the grill and place each one on a warm plate. Lift the poached eggs out of the water with a slotted spoon and rest them briefly on a folded piece of kitchen paper to remove any excess water. Place one poached egg on top of each rarebit toast.
- 8
Arrange the sliced tomatoes alongside each toast. Scatter over the chopped chives and finish with a grind of black pepper. Serve immediately while the sauce is still molten and the egg yolk is runny.
Nutrition per serving
342kcal
Calories
27g
Protein
28g
Carbs
13g
Fat
4g
Fibre
5g
Sugar
480mg
Sodium
Pro Tips
- ✓
Use the strongest reduced fat cheddar you can find. A more intensely flavoured cheese means you need less of it to achieve a bold taste.
- ✓
Stir the cheese sauce constantly and always remove the pan from the heat before adding the cheese and egg yolk to keep the sauce smooth and velvety.
- ✓
Seeded wholegrain bread adds extra fibre and a nutty flavour that pairs really well with the tangy cheese sauce.
- ✓
If you want extra protein without extra calories, add a handful of baby spinach leaves to the plate as a simple side.
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The sauce thickens as it cools, so if you are reheating it, always add a small splash of skimmed milk and stir over a low heat until it loosens to the right consistency.
Frequently Asked Questions
Variations
- •
Spicy Harissa Rarebit
Stir half a teaspoon of rose harissa paste into the cheese sauce along with the mustard and paprika for a warming North African twist that pairs brilliantly with the sharp cheddar.
- •
Mushroom and Herb Rarebit
Sauté a handful of sliced chestnut mushrooms with a little garlic and fresh thyme until golden, then pile them onto the toast before spooning over the cheese sauce. This adds extra fibre, B vitamins and a lovely earthiness.
- •
Spinach and Tomato Rarebit
Wilt a large handful of baby spinach in a dry pan and layer it onto the toast with sliced roasted tomatoes before adding the sauce. This boosts iron and vitamin C content significantly.
- •
Gluten Free Rarebit
Use thick-cut gluten free seeded bread and check that your Worcestershire sauce and mustard powder are certified gluten free. The cheese sauce itself is naturally gluten free as it uses cornflour.
Substitutions
- •skimmed milk → unsweetened oat milk or unsweetened almond milk (Use an unsweetened, barista-style plant milk for the closest consistency. The sauce will be slightly less creamy but still very good.)
- •reduced fat mature cheddar → reduced fat gruyere or half-fat mozzarella blended with a little nutritional yeast (Gruyere melts beautifully and has a nutty depth. Nutritional yeast adds a cheesy flavour if you want to reduce the dairy content further.)
- •cornflour → arrowroot powder (Use the same quantity. Arrowroot gives a slightly glossier finish to the sauce and is a good option for those avoiding corn.)
- •wholegrain bread → thick-cut rye bread or gluten free seeded bread (Rye bread has an excellent fibre content and its slightly sour flavour complements the cheese sauce very well.)
- •Worcestershire sauce → soy sauce mixed with a small drop of apple cider vinegar (Use half a teaspoon of soy sauce and a tiny drop of apple cider vinegar to mimic the savoury, slightly tangy quality of Worcestershire sauce.)
🧊 Storage
Store any leftover cheese sauce in an airtight container in the fridge for up to 2 days. Do not store the assembled rarebit toast as the bread will become soggy. Reheat the sauce gently in a saucepan over a low heat with a splash of skimmed milk, stirring until smooth before using.
📅 Make Ahead
The low fat cheese sauce can be prepared the evening before and stored in the fridge. In the morning, simply toast the bread, reheat the sauce gently and grill as directed. This cuts the active morning prep down to under 10 minutes.
