
Beurre blanc is one of those classic French sauces that feels intimidatingly fancy but is completely achievable at home with a little patience and cold butter. This version swaps the traditional white wine for fresh apple cider and apple cider vinegar, creating a reduction that's bright, lightly sweet, and beautifully tangy before the butter even enters the picture. Because the ingredient list is built entirely around apple cider, vinegar, shallot, thyme, and butter, there's nothing here that falls into the nightshade family — no tomatoes, no peppers, no paprika hiding in a spice blend. The technique is the star: adding cold butter cubes one or two at a time over very low heat builds a silky, creamy emulsion that clings perfectly to fish, poultry, or roasted vegetables. Fresh chives scattered on top at the end add a gentle oniony finish without any of the usual suspects that can make restaurant sauces off-limits. It's the kind of sauce that makes a simple weeknight piece of salmon feel like a proper dinner party plate.
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Combine the apple cider, apple cider vinegar, minced shallot, thyme sprig, and salt in a small saucepan over medium heat. Bring to a simmer and cook until the liquid has reduced to about 2 tablespoons and the shallot is very soft, 8–10 minutes.
Remove the thyme sprig and discard it. Pour the reduction through a fine-mesh strainer into a small bowl, pressing the shallot solids to extract all the liquid, then discard the solids. Return the strained reduction to the saucepan over the lowest heat setting.
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