Basil Buttermilk Dressing

What You’ll Need to Make This Dressing

A food processor is your best bet here — it gives you the control to chop the basil without turning it into a paste. A blender works too, but you may need to scrape down the sides a few times. You’ll also need a chef’s knife and cutting board for mincing the shallot and garlic, and a set of measuring spoons for the vinegar and mustard. No special gadgets required beyond that.

Tips for a Silky-Smooth Dressing

For the creamiest result, make sure your buttermilk and mayonnaise are well chilled before blending — cold ingredients emulsify more easily. When you add the basil, pack the leaves loosely into the measuring cup; don’t press them down. Overprocessing can turn the dressing a muddy green, so pulse just until the basil is finely chopped and the mixture is uniform. Taste after blending and add a pinch more salt if needed; the saltiness of mayonnaise varies by brand.

Why This Dressing Works So Well

The combination of buttermilk and mayonnaise is a classic trick for a homemade dressing that’s both tangy and luxuriously creamy. Buttermilk provides a gentle acidity that brightens the basil, while the mayonnaise adds body and helps the dressing cling to salad leaves. Letting the dressing rest in the fridge for 30 minutes before serving allows the flavors to meld — the shallot mellows and the basil’s aroma deepens. If you’re using a high-speed blender, be careful not to liquefy the basil; a food processor gives you more control over the texture.

Three Easy Twists on This Dressing

Swap the basil for an equal amount of fresh dill or chives for a completely different herbaceous profile. For a dairy-free version, use a plant-based buttermilk substitute (like almond milk with a splash of lemon juice) and vegan mayonnaise — the dressing will still be creamy and tangy. Add a small jalapeño, seeded and roughly chopped, along with the basil for a spicy kick that pairs beautifully with grilled chicken salads. If you prefer a thinner dressing, whisk in an extra tablespoon of buttermilk after blending until it reaches your desired consistency.