Red Onion Jam Recipe

By
J. Kenji López-Alt
Kenji Lopez Alt
J. Kenji López-Alt
Culinary Consultant
Kenji is the former culinary director for Serious Eats and a current culinary consultant for the site. He is also a New York Times food columnist and the author of The Food Lab: Better Home Cooking Through Science.
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Updated March 25, 2025
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Note: This jam will stay good in a sealed container in the fridge for up to 3 months. Red Onion Jam is a perfect accompaniment for a cheese plate or charcuterie, and goes particularly well with blue cheese.

Recipe Details

Red Onion Jam Recipe

Cook 2 hrs
Active 15 mins
Cooling Time 30 mins
Total 2 hrs 30 mins
Makes 2 cups
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Ingredients

  • 6 cups finely diced red onions (about 4 large)

  • 2 cups sugar

  • 1 (750 ml) bottle dry red wine

  • 1 cup red wine vinegar

Directions

  1. Combine all ingredients in a large saucepan and bring to a simmer over high heat, stirring until sugar is dissolved. Reduce to a simmer and cook, stirring occasionally, until thick and syrupy and reduced to about 2 cups, 1 1/2 to 2 hours. Allow to cool, then transfer to an airtight container and store in the fridge.

This Recipe Appears In

Nutrition Facts (per serving)
2821 Calories
3g Fat
557g Carbs
19g Protein
×
Nutrition Facts
Amount per serving
Calories 2821
% Daily Value*
Total Fat 3g 3%
Saturated Fat 0g 2%
Cholesterol 0mg 0%
Sodium 93mg 4%
Total Carbohydrate 557g 203%
Dietary Fiber 19g 68%
Total Sugars 468g
Protein 19g
Vitamin C 71mg 357%
Calcium 375mg 29%
Iron 8mg 44%
Potassium 3289mg 70%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

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