01 -
Combine dry white wine, tarragon vinegar, and minced shallots in a small saucepan. Bring to a gentle simmer over medium heat and reduce by half. Remove from heat and cool slightly.
02 -
Add egg yolks, tarragon leaves, a pinch of salt, and cooled reduction to a blender or food processor. Blend until the mixture is smooth and lightly frothy.
03 -
With the machine running, slowly drizzle in the hot melted butter in a thin, steady stream, blending until the sauce becomes thick and creamy.
04 -
Taste and adjust seasoning with additional salt and freshly ground black pepper. Pulse briefly to combine. If desired, stir in extra chopped fresh tarragon for color.
05 -
Transfer sauce to a serving vessel. Serve hot over steak, eggs, seafood, or vegetables. Use immediately for best texture.