How to Make a Roux?
A roux (pronounced roo) is a simple mix of butter and flour cooked together, and it’s the base for countless sauces, like béchamel, gravy, gumbo, and even mac and cheese. This classic French technique creates a smooth, creamy texture without lumps or raw flour taste. In this guide, I’ll show you how to make a roux step by step and explain the difference between white, blond, and brown roux.
Table of contents
A Quick Note Before We Start
So what exactly is a roux? It’s a cooked paste of butter and flour that thickens a liquid, like milk, stock, or broth, into a smooth, velvety sauce.
For a long time, I would just throw together a quick roux in a pan without giving it much thought. But during my training at the Ferrandi culinary school in Paris, I finally understood the technique: what to pay attention to, how to cook it properly, and how each type of roux (white, blond, brown) changes the final flavor. Since then, my sauces have become consistently smooth and delicious!
My 3 Best Tips for a Perfect Roux
Before jumping into the recipe, here are three tips I learned in culinary school that make all the difference:
- Prefer a stainless steel saucepan. It heats evenly and makes it easier to control the cooking than a nonstick pan. Plus, since you’ll be whisking vigorously, it’s better to use a pan that won’t scratch.
- Always keep a whisk handy. I used to stir with a wooden spoon, but a whisk makes the roux much smoother. When you add liquid, it also prevents lumps from forming.
- Cook the flour for a few minutes. This step removes the raw flour taste and gives your sauce a finer texture. Look for small bubbles forming on the surface of the roux, that’s when you know it’s ready.
Recipe card
How to Make a Roux?
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Ingredients
- 4 tbsp unsalted butter 50 g
- 1/3 cup all-purpose flour 50 g
- 2 cups cold liquid 500ml (milk, broth, or stock)
Instructions
- Melt the butter in a saucepan over medium heat.
- Add the flour all at once and whisk immediately.
- Cook for 1 to 2 minutes for a white roux, 5 to 6 minutes for a brown roux, stirring constantly: the mixture should remain clear, without browning.
- Use right away as the base for your sauce by gradually whisking in cold milk or broth.
Notes
Nutrition
The Ideal Ratio of Roux to Liquid
A roux is always equal parts butter and flour by weight. The amount of liquid you add determines how thick your sauce will be.
Personally, I always start with the same base: 4 tbsp butter + 1/3 cup flour , then adjust the consistency:
- Thick sauce (gravy-style): 2 cups liquid, about 500 ml.
- Medium sauce: same roux for 3 cups liquid, 750 ml
- Thin sauce: same roux for 4 cups liquid, 1 Liter.
Note : If your sauce is too thin, just let it cook down a bit longer. Too thick? Add more liquid until it coats the back of a spoon perfectly.
White, Blond, and Brown Roux: What’s the Difference?
The difference between white, blond and brown roux lies in the cooking time. The longer it is cooked, the darker the color and the nuttier the taste.
- White Roux: Lightly cooked, 1 to 2 minutes. Best for white sauces like béchamel, cream sauces, or milk-based soups.
- Blond Roux: Cooked 3 to 4 minutes until golden. Great for white wine sauces, veloutés (stock-based sauces), or poultry gravies.
- Brown Roux: Cooked 5 to 6 minutes until amber with a nutty flavor. Ideal for beef or veal gravies, stews, and red wine sauces.
How to Avoid Lumps in Your Sauce
Once your roux is ready, it’s time to add the liquid. This is the trickiest step, but don’t worry, here’s how to keep it smooth and without any lumps.
- Whisk from the start. As soon as flour hits butter, whisk continuously to get a smooth paste.
- Add liquid gradually. Start with a splash, whisk until smooth, then add more little by little. This prevents clumps.
- Keep the heat moderate. Too high, and the flour will seize up into lumps.
- Rescue tip: If lumps appear, strain through a fine sieve or use an immersion blender to smooth things out.
FAQ – How to Make a Roux
Yes ! Yes! Store it in the fridge for 2–3 days or freeze for several weeks. Perfect for quick weeknight sauces.
Roux is just the butter-flour base. Béchamel is made by whisking hot milk into a white roux and often flavored with nutmeg.
If it’s too dark, don’t throw it away, use it for a rich, dark sauce instead of a light one. If you get lumps, strain or blend it with a bit of extra liquid.
