A vinaigrette is really just a ratio - once you know it, you never need to look up the recipe again. Tarragon vinaigrette takes that basic ratio and adds an herb that can carry a whole salad on its own, which makes it one of the easiest ways to upgrade something as plain as a bag of lettuce.
Prep time: 5 minutes | Makes: about 3/4 cup
The basic ratio to remember is 1 part acid to 3 parts oil, with mustard acting as the emulsifier that keeps everything from separating. Once you've internalized that, you can make a version of this dressing with almost any vinegar or herb on hand. Using our tarragon-infused vinegar in place of plain white wine vinegar deepens the flavor further and is a good way to use a vinegar you've already prepared from a garden surplus.
This vinaigrette keeps in a sealed jar in the fridge for about a week. The oil will solidify slightly when cold - just let it sit at room temperature for 10 to 15 minutes and shake well before using again.
Beyond a basic green salad, this vinaigrette works well on a simple tomato salad, drizzled over grilled or roasted asparagus, tossed with boiled new potatoes while they're still warm (a lighter alternative to a mayo-based tarragon potato salad), or spooned over grilled chicken or fish as a finishing sauce rather than a marinade.
Once you're comfortable with this ratio, tarragon vinaigrette becomes one of those things you make without measuring - taste as you go and adjust the acid, oil, or tarragon until it's right for what you're dressing. For more on using fresh tarragon elsewhere in the kitchen, see the complete tarragon guide.