Mac and Cheese 101: How to Make a Really Good One From Scratch

My family and I are serious about mac and cheese. When I started working on a simple from-scratch recipe to share here, I realized I’d been skipping the most useful thing I could tell you first: how mac and cheese actually works. Once you understand the three moving parts, you can make any version you want — you’re not locked into someone else’s recipe.

If you just want to dive straight into something, I’ve already got two versions on the blog: my Smoked Gouda and Bacon Mac and Cheese and my Healthy-ish Stovetop Mac and Cheese. But if you want to understand the why behind it all — stick around, because that’s what this post is for.

My dad cooked professionally for over thirty years, and watching him make béchamel — slowly, patiently — is where a lot of my comfort food instincts come from. Mac and cheese is essentially béchamel with cheese melted in. Once you get that in your head, the whole thing clicks.

The Three Fundamentals

1. The Pasta

Shape matters more than people think. You want something with ridges, curves, or holes — elbows, cavatappi, shells, rotini. Smooth pasta like penne or rigatoni will work, but ridged shapes grip the sauce and hold it better. That’s what gives you a bite that’s creamy all the way through instead of sauce that slides off.

Cook it al dente — two to three minutes less than the package says. If your pasta is fully cooked before it goes into the sauce, it’ll overcook by the time everything comes together and you’ll end up with mush.

And salt your pasta water well. Heavily salted water seasons the pasta from the inside out, and it matters — under-salted pasta in a rich cheese sauce tastes flat.

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2. The Roux

The Roux

A roux is just butter and flour cooked together, and it’s the base for your cheese sauce. Equal parts by weight — typically four tablespoons each for a pound of pasta. Melt the butter first, then whisk in the flour and cook it for a full minute over medium heat. That minute matters: it cooks out the raw flour taste. Your roux should look pale golden and smell slightly nutty before you add anything else.

Then comes the milk, and here’s a tip that goes against what you’ll read everywhere else: I actually use cold milk, not warm. Cold milk gives you a smoother, thicker béchamel than room temperature or warmed milk does. The catch is that cold milk added too fast will lump on you — so you have to add it slowly, a little at a time, whisking constantly between each addition rather than pouring it all in at once. Slow and easy wins this race. Once all the milk is in, keep whisking over medium heat until the sauce thickens, about three to four minutes.

Now you have béchamel. Cheese goes in next, off the heat.

3. The Cheese

Pull the pot off the heat before any cheese goes in. This is the most important thing in this entire post. Cheese added to boiling liquid seizes up — the proteins tighten, the fat separates, and you get a greasy, grainy sauce instead of a smooth one. Off the heat, always.

Add cheese in a couple of additions and stir as you go. The residual heat in the sauce is enough to melt it through without any drama.

Choosing Your Cheeses

The best mac and cheese uses two or three cheeses — one for flavor, one for melt, and optionally one for insurance. Here’s how to think about each:

A classic starting blend: sharp cheddar (flavor) + Gruyère (melt + depth) + a little cream cheese (stability). From there you can swap, add, and adjust based on what you like and what you have.

The Basic Mac and Cheese Recipe

This is the foundation. Simple, classic, and completely reliable. Use this as your starting point and take it wherever you want from there.

1. Make the roux. In a medium saucepan, melt ¼ cup butter over medium heat. Whisk in ¼ cup flour and cook, stirring constantly, for 2 minutes. Don’t let it brown — you want pale and nutty, not toasty.
2. Add the milk. Gradually whisk in 1½ cups cold milk, a little at a time, whisking constantly between additions — add it too fast and it’ll lump. Slow and easy wins this race. Bring to a gentle boil, still whisking, until the sauce thickens — about 2 to 3 minutes.
3. Cook the pasta separately. While the sauce is going, cook your pasta in heavily salted boiling water until al dente (2–3 minutes less than the package says). Reserve ½ cup of pasta water before draining.
4. Off the heat — add the cheese. Pull the saucepan off the burner. Add 16 oz of freshly grated cheddar in two additions, stirring until fully melted and smooth after each one. Season with salt, pepper, and a pinch of nutmeg.
5. Combine. Pour the reserved pasta water into the sauce (it helps it cling and stay loose), then add the drained pasta. Stir to coat. The sauce will thicken as it sits — if it gets too thick, a splash more cold milk, added slowly, brings it right back.
6. Taste and serve. Adjust salt. Eat immediately, or keep warm over very low heat with a lid on.

FAQ

Mac and cheese is one of those things where understanding the “why” behind each step makes you a better cook beyond just this recipe. The roux logic, the off-heat rule, the cheese choice — these show up all over the place once you start looking for them.

Start with the base, get comfortable with it, and then start playing. I’d love to see what combinations you land on. Tag me at @CheersJennSmith or leave a comment below.

Cheers Mac and cheese is one of those things where understanding the “why” behind each step makes you a better cook beyond just this recipe. The roux logic, the off-heat rule, the cheese choice — these show up all over the place once you start looking for them.

Start with the base, get comfortable with it, and then start playing. I’d love to see what combinations you land on. Tag me at @CheersJennSmith or leave a comment below.

Cheers 🥂,

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