Creamy Lemon Poppy Seed Dressing Recipe

With aromatic fresh lemon syrup and tangy buttermilk as its foundation, this sweet and sour dressing is a great way to lighten up summer salads.

By
Stella Parks
Stella Parks
Editor Emeritus
Stella Parks is a CIA-trained baking nerd and pastry wizard, dubbed one of America's Best New Pastry Chefs by Food & Wine. She was the pastry editor at Serious Eats from 2016 to 2019.
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Updated February 02, 2024
Overhead view of a colorful, mango-studded salad dressed with lemon poppy seed dressing.

Serious Eats / Vicky Wasik

Why It Works

  • Fresh lemon syrup provides an aromatic, low-moisture base for this recipe.
  • Buttermilk acts as an emulsifier, creating a dressing that's creamy but light.
  • Minimally processed poppy seeds have more flavor than their supermarket brethren.

The first job I ever had was in a restaurant that practiced the time-honored tradition of family meal. In the lull after our final seating, and before the kitchen truly broke down, we'd all cram around a little table in the break room and dig into whatever had turned up on the menu that day, a veritable merry-go-round of retro Americana. The only constant was the house salad, a tangle of mixed greens and fresh fruit dressed with a creamy, zippy poppy seed vinaigrette, the tartness of lemon juice and buttermilk balanced by just a bit of sugar.

I used to smuggle it home in a Styrofoam cup, like some sort of dressing mule. My inclination to its toasty, sweet flavor was probably the only thing getting nutrients into my system at a time when my diet consisted of little more than Pop-Tarts and SnackPack. Maybe it's nostalgia for those summer days when I first settled into the rhythms of restaurant life, or the fact that lemon and poppy seed is a combo pulled straight from the pastry chef's playbook, but it's still my favorite dressing today.

Now that I've gotten into the habit of keeping a bottle of my fresh lemon syrup on hand, it's even easier to make, because I don't have to shake a jar of this vinaigrette till my arm falls off while I wait for the sugar to dissolve. And, since my technique uses the power of the citric acid in lemon rinds to dissolve the sugar, it's far less watery and sweet than simple syrup, giving the dressing more body and aroma. That makes for a particularly creamy dressing.

Almost any salad oil will do, but if you're feeling fancy, pistachio is great. It's a change of pace from standard olive oil, and its signature flavor gives the poppy seeds a lovely boost. That said, there's no reason to snub neutral, workaday oils that bring the dressing's lighter, lemony notes to the fore; my favorite is safflower, which is free from the fishy odors I associate with canola.

Profile view of a glass container containing the ingredients for lemon poppy seed dressing. The ingredients have separated out into distinct layers: lemon syrup, buttermilk and oil.

Serious Eats / Vicky Wasik

If you're thinking that there's not a lot of oil in the above photo, you're right. Unlike vinegar or straight fruit juice, buttermilk and lemon syrup are thick and mild enough to constitute the bulk of the dressing without watering it down or making it aggressively acidic (and, balanced with a judicious amount of sugar, they're none too sweet). There's nothing to stop you from using more oil if you prefer a classic 3:1 ratio. In any event, the buttermilk and syrup are powerful emulsifiers that allow the dressing to come together with the twirl of a spoon; no whisking, shaking, or processing required.

Closeup of a colorful salad, studded with mangoes and candied pistachios and dressed with lemon poppy seed vinaigrette.

Serious Eats / Vicky Wasik

Offset by an appropriately thick and tangy base, the real stars of the show are poppy seeds—delicately crisp and nutty. Stale poppy seeds are little more than organic sprinkles, flavorless but cute, so ditch the stale jar of crap you picked up at the supermarket. Fresh poppy seeds are a thing of beauty, and way more affordable online. My favorite brand is Sincerely Nuts, which are sold unwashed to preserve their natural flavor. And, uh, watch out if you're due for a drug test; the urban legends are true.

The result is a refreshingly simple summer dressing that's rich enough to turn a salad into a meal, but light enough to serve as the counterpart to the heavier fare that turns up at cookouts and barbecues. It works well with any sort of salad green, particularly blends that include arugula, but my nostalgia for those family meals of yore almost always compels me to include some sort of fruit, like ripe mango.

With a bottle of fresh lemon syrup at the ready, I can't resist adding a handful of crispy lemon candied pistachios, too, but trust me when I say this dressing is nutty enough to stand on its own.

June 2016

Recipe Details

Creamy Lemon Poppy Seed Dressing Recipe

Prep 5 mins
Active 5 mins
Total 5 mins
Makes 3 cup

Ingredients

  • 2 1/2 ounces fresh lemon syrup (1/4 cup; 70g)
  • 1 3/4 ounces safflower oil, pistachio oil, or whatever salad oil you prefer (1/4 cup; 50g)
  • 1 ounce cultured lowfat buttermilk (2 tablespoons; 30g)
  • 1 ounce lemon juice (2 tablespoons; 30g), from 1 small lemon
  • 3/4 teaspoon (3g) Diamond Crystal kosher salt; for table salt, use half as much by volume or use the same weight
  • 1 1/2 teaspoons (5g) poppy seeds, or more to taste (see note)
  • Freshly cracked black pepper

Directions

  1. In a small pitcher, squeeze bottle, or jar, combine fresh lemon syrup, oil, buttermilk, lemon juice, salt, poppy seeds, and black pepper. Stir or close lid and shake well to combine, then adjust seasoning to taste. Use immediately to dress a salad, or refrigerate in an airtight container up to 1 month.

    Profile view of the finished dressing, stirred up in a glass container.

    Serious Eats / Vicky Wasik

Special Equipment

Small pitcher, squeeze bottle, or half-pint jar

Notes

Since poppy seeds are the star of the show, make sure yours are up to snuff! Check the expiration date on the package, or have a quick taste—they should be crisp and nutty. If yours are mushy or bland, it's time to invest in a fresh batch. Look for brands that are minimally processed, like Sincerely Nuts, which retain more of their inherently nutty flavor.

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