
Butter and flour come together in this classic roux, cooked low and slow until it reaches that pale, faintly nutty straw color that signals it's ready to do its job. Optional fresh thyme and parsley lift the whole thing, turning a humble base into something that smells genuinely wonderful on the stove. Because it's built entirely from butter, all-purpose flour, salt, and fresh herbs, there's nothing here to trip up anyone avoiding oats — no hidden grain blends, no oat-thickened shortcuts, just a clean and reliable foundation. Roux can feel intimidating, but the key is constant stirring over medium-low heat and a little patience — two to three minutes is all it takes to cook out the raw flour taste and develop that smooth, cohesive paste. From there, whisk in warm milk for a silky béchamel or broth for a velouté, and you have the backbone of countless sauces and gratins. It also stores beautifully — refrigerate it for up to three days or freeze it in tablespoon portions for a month, so you can always have a safe, homemade thickener on hand whenever a recipe calls for one.
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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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