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Slow Cooker Caramelized Onions

Author: Michelle


  • 4 lb (6 large) onions; sliced
  • 2 tbsp butter; melted
  • 2 tbsp extra virgin olive oil
  • 1 tsp kosher salt


  1. Slice the onions and add them to a large bowl.
  2. Melt the butter in the slow cooker (or however)
  3. Add the olive oil, a bit at a time to the bowl of sliced onions along with a bit of salt at a time and mix well by hand.
  4. Continue until all the oil and salt has been mixed into the onions and all the onion pieces are separated. Cover.
  5. Cook on low for 6-8 hours; stir well and replace the lid
  6. If there is a significant amount of water, keep the lid slightly open, allowing the moisture to escape.
  7. Cook for a total of 12-13 hours.
  8. Serve as needed.

Recipe Notes

Additional add-ins;
1 tsp black pepper
1 tsp thyme
1 tbsp brown sugar
1 tsp balsamic vinegar