
Rich, glossy, and deeply aromatic, this classic French butter sauce is built on a white wine and vinegar reduction layered with shallots and fresh tarragon — no shortcuts, no packets, just pure technique and real ingredients. Because it relies entirely on butter, egg yolks, wine, vinegar, and fresh herbs, there is nothing here that introduces fermentation or leavening agents, making it a naturally clean fit for anyone avoiding yeast in their diet. The clarified butter is the secret weapon: by removing the milk solids, you get a stable, silky emulsion that holds together beautifully and carries that unmistakable golden richness. Whisking the yolks over a double boiler until they reach the right temperature is the step that transforms this from a simple mixture into something genuinely restaurant-worthy. A final hit of fresh tarragon and a squeeze of lemon juice brightens everything up and makes the flavors pop. Spoon it over a perfectly cooked steak, grilled fish, or roasted vegetables and it will absolutely steal the show.
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Clarify the butter: melt the butter in a small saucepan over low heat until the milk solids sink and the foam subsides, about 8–10 minutes. Skim the foam from the surface, then carefully pour the clear golden liquid into a heatproof measuring cup, leaving the white milk solids behind. Keep warm.
Make the reduction: combine the white wine vinegar, white wine, shallots, roughly chopped tarragon, and cracked black pepper in the small saucepan over medium heat. Simmer until the liquid is reduced to about 2 tablespoons, 4–5 minutes. Strain through a fine-mesh strainer into a heatproof bowl, pressing the solids to extract all the liquid; discard the solids.
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