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Caramelized Onion & Marrow Spread

The recipe for Caramelized Onion & Marrow Spread, although only requiring a few ingredients, has an amazing complex flavour
Prep Time 30 mins
Cook Time 1 hr
Total Time 1 hr 30 mins
Course Starter
Servings 6


  • 4 large onions, peeled, cut into half-moons and thinly sliced
  • 6 Tablespoons olive oil, divided
  • 2 Tablespoons water
  • 1 large marrow
  • 1 ½ teaspoons lo salt (see note above)
  • ½ teaspoon freshly cracked black pepper


  • Heat 4 tablespoons of oil in a large pan over medium heat.
  • When the oil is hot, but not smoking, add the sliced onions. Give the mixture a good stir, so that the onion slices are evenly coated with the oil.
  • Leave undisturbed for 10-15 minutes, so that the onion slices in the bottom of the pan crisp up and brown slightly.
  • After that time, stir the mixture again and reduce the heatto low. Cook for additional 45 minutes.
  • Stir every 20 minutes and add 1 tablespoon of water each time (2 in total), to release some caramelized bits that might have stuck to the bottom of the pan.
  • In the meantime, grate the marrow into a large bowl.
  • Transfer the grated marrow to a colander and squeeze it with the back of a spoon (or using your hands) to release as much water as possible. Set aside until the onions are cooked.
  • As soon as the onions have caramelized, add the marrow, low salt, pepper and additional 2 tablespoons of olive oil to the pan.
  • Cook, stirring often, for additional 30 to 40 minutes, or until the marrow has reduced significantly and the mixture has a jam-y kind of texture.
  • The spread can be kept, stored in a airtight container in the fridge, for up to 1 week.
Keyword Caramelized Onion & Marrow Spread Recipe