How to Make Brown Butter (And Why It Belongs in Your Cooking)

Butter is made up of water, fat, and milk solids. Heat it up and those parts separate: the water boils off first, and once the fat hits around 130°C, the milk solids start to fry. Handle that stage carefully and they turn a deep golden brown, and that’s where all the flavour lives. The aroma alone tells you something’s changed. Nutty, caramelised, a little toasty. It’s one of the defining flavours of cold-weather cooking, and it deserves a permanent spot in your kitchen.

What brown butter is good for

On the sweet side, it adds nuttiness and depth to cookies, brownies, cheesecake, ice cream, pretty much anywhere butter shows up. Keep in mind you’ve boiled off water in the process (roughly 25% of the butter’s original weight), so if you’re subbing it in for melted butter in a recipe, add a splash of cream or water back in. Don’t skip the browned solids either. That’s where most of the flavour is. Whisking in a little non-fat milk powder while you brown it will give you even more of them.

On the savoury side, brown butter and sage is the classic pairing, the kind of combination that makes roast potatoes or a simple pasta sauce taste like autumn. Use it as a cooking fat, though if you’re sauteing over high heat, strain the milk solids out first so it doesn’t smoke as easily. My favourite uses: blended into soups and purees, whisked into hollandaise instead of plain melted butter, and roasting vegetables, especially potatoes. A lot of classic French sauces are really just browned butter balanced against something sharp, vinegar, lemon, capers. Minutes of work for a genuinely complex sauce.

How to make it

I make it in big batches, a full 500g block at a time, and keep it in the fridge for whenever I need it. It’ll last months as long as you keep a clean spoon in it. The same process gets you clarified butter or ghee too, so it’s worth having in your back pocket regardless.

All you need is a whisk, a pot, and something heatproof to store it in.

1. Cube the butter and add it to a pot, ideally one with a light-coloured interior so you can actually see the colour change.
2. Crank the heat to high. Start whisking as it melts.
3. Once melted, keep whisking while it bubbles.
4. When the bubbles slow down, most of the water has evaporated.
5. Drop the heat to medium for more control, and whisk constantly while you watch the colour.
6. The darker the milk solids get, the more flavour you’ll get. But push it too far and it turns acrid and bitter, so don’t walk away.
7. Check the colour with a spoon or by blowing gently on the surface. I stop at a light hazelnut colour since it darkens a little more as it sits.
8. Pull it off the heat. If it’s not in danger of burning, I like to let it sit in the pot off the stove for another 15 minutes. That extra time lets the caramelised solids infuse a bit longer.

For sweet applications, leave the solids in. For savoury, I’ll infuse the butter with lightly crushed garlic and a hard herb like thyme, rosemary, or sage first, either straining the butter through the aromatics, or pulling the aromatics out before the butter sets. One warning from experience: don’t add fresh herbs or garlic straight onto butter that just came off the stove. It’ll deep-fry on contact, bubble over, and you’ll have a mess and a small fire hazard on your hands.

If you want to go further, strain the milk solids out after step 4 for clarified butter, or let them toast a little longer before straining for ghee.

The fast version

If all you want is a quick pan sauce or a drizzle over pasta, you don’t need the full batch. Add 4 tablespoons of butter to a hot pan and cook, keeping it moving with a spoon so the solids don’t catch and burn. One thing worth knowing: adding oil doesn’t stop butter from burning, that’s an old wives’ tale, ignore it. Depending on your heat, this takes a minute or two, and it can go from perfect to burnt just as fast, so stay with it.