Béchamel is a ratio, not a recipe: 2 tablespoons each of butter and flour per cup of milk gives a pouring sauce, double the roux and you get something thick enough to hold a lasagne together. The lumps everyone fears come from adding cold milk fast to a hot roux, and are entirely avoidable by adding it in three goes.
The ratio2 tbsp butter + 2 tbsp flour + 1 cup milk = pouring sauce. Double the roux for a thick one.
By Vince Gonzalez · Published July 2026 · Sourcing verified 5 Jul 2026
Prep2 min
Cook12 min
Makes2 cups
CuisineFrench
Cost$
Vegetarian
Contains dairy · gluten
Make it vegan: use plant milk, oil, or a vegan cheese for the dairy.
Make it gluten-free: swap in a gluten-free flour blend (check the other labels too).
The Ingredients — and where to get them
Cook for2cups
Our ratio, your call. The amounts below are a tested starting point — a version, not the one and only. Anything tagged to taste is the knob you turn: start there, then make it yours.
Butter
Unsalted so you control the seasoning. A cultured butter gives a noticeably better sauce.
Warm the milkGently, with the bay leaf if using. It doesn't need to boil, just take the chill off.
Cook the rouxMelt the butter, whisk in the flour, and cook over medium-low for two full minutes. It should smell faintly of biscuits and stay pale — this is a white roux, so no colour.
Add milk in three goesFirst third, whisking hard until it's a thick paste. Second third, whisking until smooth again. Then the rest. Adding it gradually is the entire anti-lump technique.
Simmer to thickenEight to ten minutes at a bare simmer, whisking often. It's ready when it coats a spoon and a finger drawn through leaves a clean line.
Season at the endSalt, white pepper, nutmeg. Salt last because the sauce reduces and concentrates as it cooks.
Make it yoursAdd grated cheese off the heat and it becomes Mornay, which is mac and cheese. Sweat onion in the butter first for soubise. Stock in place of half the milk moves it toward velouté. Miso whisked in at the end is not traditional and is very good.
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