Extra Mature Cheddar Cheese Sauce for Mac and More

Extra mature cheddar cheese sauce is a rich, smooth stovetop sauce made with sharp cheddar, milk and a simple butter-and-flour roux. It comes together quickly and brings bold flavor to macaroni, vegetables, baked potatoes or toast; gentle heat and freshly grated cheese help keep it creamy rather than grainy.

Ingredients

3 tablespoons (42 g) unsalted butter
3 tablespoons (24 g) all-purpose flour
2 cups (475 ml) whole milk, preferably at room temperature
1 teaspoon (5 ml) Dijon mustard
¼ teaspoon (1 g) fine salt, plus more to taste
⅛ teaspoon (0.3 g) freshly ground black pepper
⅛ teaspoon (0.3 g) cayenne pepper, optional
2 cups (200 g) extra mature cheddar cheese, freshly grated from a block

Instructions

Grate the cheese. Grate the cheddar on the large holes of a box grater and set it aside. Letting it lose its chill while you prepare the sauce helps it melt evenly. Pre-shredded cheese can be used in a pinch, but its anti-caking coating may make the sauce less smooth.
Make the roux. Melt the butter in a medium saucepan over medium-low heat. Add the flour and whisk continuously for about 1½ minutes, until the mixture is smooth, lightly bubbling and smells mildly nutty. Keep it pale; browning the flour gives the sauce a toasted flavor and can make the color darker.
Add the milk gradually. Pour in about ½ cup (120 ml) of milk while whisking until smooth, then whisk in the remaining milk in two additions. Bring the mixture to a gentle simmer, whisking often, and cook for 4–6 minutes until it coats the back of a spoon. Do not let it boil hard, which can cause scorching or lumps.
Season and melt in the cheddar. Remove the saucepan from the heat. Whisk in the mustard, salt, black pepper and optional cayenne. Add the grated cheddar in three or four small handfuls, whisking until each addition has melted before adding the next. Taste and adjust the salt. Serve right away, or keep warm over very low heat while stirring; do not boil the finished sauce.

Tips

Grate cheese from a block rather than relying on pre-shredded cheese. Packaged shreds are convenient, but their coating can interfere with a silky finish.
Keep the pan off the heat when adding cheddar. High heat can make cheese proteins tighten and separate, leaving an oily or grainy sauce.
If the sauce seems too thick, whisk in warm milk a tablespoon (15 ml) at a time. If it is too thin, return it to low heat and stir for a minute or two; avoid adding extra flour directly, which tends to clump.
Cheddar varies in saltiness and sharpness. Start with the listed salt, then taste after the cheese melts. A little mustard adds depth without making the sauce taste strongly of mustard.

Serving Suggestions

Toss the sauce with 1 pound (450 g) of cooked macaroni for a straightforward cheese pasta, loosening it with a splash of pasta water if needed. Spoon it over steamed broccoli, cauliflower, baked potatoes or roasted vegetables, or use it as a dip for crusty bread and soft pretzels. For Welsh rarebit-style toast, spread the sauce over toasted bread and briefly brown it under a hot broiler, watching closely so it does not burn.

This quantity makes enough to coat a generous family-size portion of pasta or to serve as a sauce for several sides. For a pasta bake, combine the sauce with cooked pasta and transfer it to a baking dish; the sauce will thicken as it bakes, so keep it slightly looser than you want the final dish.

Variations

Smoky: Stir in ½ teaspoon (1 g) smoked paprika with the seasonings. It adds a gentle smoke note without changing the method.
Garlicky: Cook 1 small minced garlic clove (about 3 g) in the melted butter for 30 seconds before adding flour. Do not let it brown.
Beer cheddar: Replace ½ cup (120 ml) of the milk with a mild lager or pale ale. Add it gradually with the milk; the result is more aromatic and slightly less creamy. Simmer the roux mixture gently before adding cheese.
Different cheese: Replace up to half the cheddar with Gruyère or Monterey Jack. Gruyère gives a nuttier flavor, while Monterey Jack makes the sauce milder and softer. Avoid replacing all the cheddar if you want its distinctive sharpness.

Storage and Reheating

Cool leftovers promptly and refrigerate in a covered container within 2 hours of cooking. The sauce keeps for 3–4 days in the refrigerator. It will firm up as it chills; that is normal. For longer storage, freeze it in a freezer-safe container for up to 2 months, although thawed cheese sauce may be less smooth.

Reheat gently in a small saucepan over low heat, stirring frequently and adding milk a tablespoon (15 ml) at a time until it loosens. Avoid boiling. A microwave also works: heat in short 20-second bursts at medium power, stirring between bursts. If reheating as part of a leftover meal, heat the complete dish to 165°F (74°C), the USDA FSIS safe minimum for reheated leftovers. Discard sauce left at room temperature for more than 2 hours.

Frequently Asked Questions

Why did my cheddar sauce turn grainy?
It was probably overheated or the cheese was added while the sauce was boiling. Take the pan off the heat before adding cheese, use freshly grated cheddar, and stir in small batches. If it is only slightly grainy, whisking in a little warm milk may improve the texture, though it may not fully recover.

Can I make this without flour?
Flour gives this recipe its reliable, roux-based thickness. For a gluten-free version, use a cup-for-cup gluten-free flour blend in the same quantity, checking that it contains no ingredients that need a different cooking method. The texture can vary by blend. A cornstarch slurry is another option, but it makes a somewhat glossier sauce: whisk 1 tablespoon (8 g) cornstarch with 2 tablespoons (30 ml) cold milk, then stir it into the simmering milk before adding cheese.

Can I use low-fat milk?
Yes. The sauce will usually be a little less rich and may need less time to thicken. Avoid using very low-fat or non-dairy milk unless you know it behaves well in cooked sauces; some separate or taste thinner. Unsweetened, unflavored plant milk is the most suitable substitute, but the flavor will change.

Can I make the sauce ahead?
It is best served freshly made, but you can prepare it up to 2 days ahead and refrigerate it promptly. Reheat slowly with a splash of milk, stirring until smooth. Do not leave it warm for an extended period, since prolonged heating can make the cheese separate.

What if I do not have extra mature cheddar?
Use mature cheddar if available; the sauce will be slightly milder. A blend of sharp cheddar and a small amount of Parmesan can add more savory depth, but Parmesan is saltier, so taste before adding extra salt.

Why is the sauce too thick after cooling?
Cheese sauces naturally firm as they cool. Reheat it over low heat and whisk in warm milk a little at a time until it reaches the consistency you want. Avoid adding cold milk all at once, which can cool the sauce unevenly and make it harder to smooth out.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).