Cheese Sauce
Cheese sauce splits for one reason: the cheese went into a boiling base. Above 80 °C the cheese proteins tighten and squeeze the fat out, and instead of a velvet sauce you get curds sitting in an oily puddle. So the béchamel comes off the heat, and the residual warmth melts the cheese.
- Prep
- 5 min
- Cook
- 15 min
- Total
- 20 min
- Servings
- 6
- Level
- Easy
- Per serving
- 265 kcal
Ingredients
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What to use instead
Gruyère, Gouda or a mix works in place of cheddar. Parmesan alone does not: it is too dry and turns the sauce gritty.
Makes: about 600 ml
Shopping list
The ingredients for the servings you chose — copy them or send them to a messenger. Tick what you already have at home: only the rest goes on the list.
Method
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Step 1: Grate the cheese yourself
Bagged grated cheese is dusted with starch to stop it clumping; it melts sluggishly and leaves a slight sandiness. Grate a block on the coarse side.
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Step 2: Make the roux
Melt the butter, add the flour and stir for 2 minutes over medium heat, keeping it pale.
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Step 3: Add the milk in stages
Whisk in the warm milk in three additions, smoothing each one completely. The first will give a very stiff paste, which is exactly right.
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Step 4: Cook the base out
Bring to a gentle simmer and cook for 5–7 minutes, stirring. The starch has to swell fully or you will taste the flour.
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Step 5: Off the heat, then the cheese
Take the pan off the hob and stir the cheese in by the handful, letting each one disappear. The béchamel is around 80 °C now — hot enough to melt cheddar, cool enough not to break it.
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Step 6: Season
Add the mustard, smoked paprika, nutmeg, salt and pepper. The acidity in the mustard also helps keep the cheese proteins loose and smooth.
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Step 7: Adjust the thickness
Loosen with milk to the consistency you want, remembering that it thickens as you watch: both the starch and the cheese tighten as it cools.
Tips & variations
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Tip
If it does turn grainy, take it off the heat, add 2 spoonfuls of cold milk and blitz with a stick blender — that usually brings the texture back.
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Swap
Gruyère, Gouda or a mix works in place of cheddar. Parmesan alone does not: it is too dry and turns the sauce gritty.
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Variation
For nachos, loosen the sauce with another 100 ml of milk and add a teaspoon of paprika with a pinch of chilli — it should run off a chip easily.
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Storage
Three days in the fridge. Reheat only over low heat with a few spoonfuls of milk; a microwave splits it almost every time.
Nutrition
| 1 serving | Whole dish 6 servings | |
|---|---|---|
| Energy | 265 kcal | 1,590 kcal |
| Protein | 10 g | 60 g |
| Fat | 19 g | 114 g |
| Carbohydrates | 12 g | 72 g |
Approximate values calculated from standard ingredient data.
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