Urgent! A question about a recipe: Horseradish Dill Potato Salad

I have a question about the ingredient "buttermilk" on the recipe "Horseradish Dill Potato Salad" from thirschfeld.

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Dscn0826
thirschfeld added 4 months ago

If you don't have buttermilk you can use plain yogurt, or add 1 teaspoon of vinegar to 1 cup of whole milk.

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