
Butter and flour come together in this classic roux, building the kind of silky, deeply savory base that transforms a simple sauce into something genuinely impressive. The technique is straightforward — low heat, constant stirring, and a little patience until the paste turns that signature pale straw color and smells faintly nutty. Optional fresh thyme folded in off the heat adds a subtle herbal lift that makes the finished sauce feel a step above anything from a packet or jar. Because the ingredient list is so clean and intentional, there's no need to scan labels or second-guess what's hiding in a pre-made product — just butter, flour, salt, and herbs. It works beautifully as the foundation for a béchamel or velouté, and the make-ahead tip means you can stash tablespoon portions in the freezer and pull them out whenever a creamy sauce is calling. Fresh parsley stirred in just before serving brightens the whole thing and keeps the flavors tasting lively rather than heavy.
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Melt the butter in a small heavy-bottomed saucepan over medium-low heat until fully melted and just beginning to foam, about 1 minute. Do not let it brown.
Add the flour all at once and stir immediately with a wooden spoon or silicone spatula, working the mixture into a smooth paste. Continue stirring constantly for 2–3 minutes, until the roux smells faintly nutty and turns a pale straw color — it should pull away from the sides of the pan slightly and look dry on the surface.
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