Sweet & Sour Potato Salad

This potato salad goes the old-fashioned route, the way Pennsylvania Dutch and Midwestern cooks have made it for generations. Instead of the standard mayonnaise-based dressing, this one starts with a cooked vinegar-egg dressing on the stovetop, then folds in mayonnaise after it cools. The result is sharper, sweeter, and more complex than a straight mayo salad.

The cooked dressing technique is what defines it. Sugar dissolved in vinegar with egg yolks and a knob of butter, brought just to a boil, then chilled before mayo joins the party. The egg yolks act as an emulsifier and a thickener; the result coats the potatoes like a custard rather than dripping off them.

Sweet pickles, hard-boiled eggs, and a teaspoon of celery seeds round out the flavors. Made the day before (the recipe insists on it) so everything melds, this is the kind of potato salad that wins at potlucks and family reunions.

Pro Tips

• Cook potatoes whole when possible, then peel and cube. Peeling first leaches starch into the cooking water and gives mushier results.
• Cube potatoes while they’re still slightly warm so they absorb the dressing as it cools. Cold potatoes shed dressing.
• Whisk the dressing constantly while it cooks. Egg yolks scramble fast on direct heat; constant stirring keeps the texture smooth.
• Cool the cooked dressing fully before adding mayonnaise (the recipe specifies it). Hot dressing breaks the mayo and makes the dressing oily.
• The 24-hour refrigeration is mandatory. Eaten same-day, the salad tastes harsh and disjointed; given time, the dressing penetrates the potatoes and everything balances.

Variations

• Add 1 cup of finely chopped celery and ½ cup of chopped red onion for crunch and bite.
• Stir in 4 slices of cooked, crumbled bacon for a German-style hot bacon-dressed potato salad.
• Replace sweet pickles with chopped dill pickles plus 1 tablespoon of pickle juice for a tangier, less sweet version.