Slow Cooker Caramelized Onions
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Slow Cooker Caramelized Onions
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These slow cooker caramelized onions turn buttery, golden, and jammy with almost no effort! No endless stirring for this rich, deeply flavored kitchen staple.
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Ingredients
- 4 large yellow onions thinly sliced
- 2 tablespoon butter or olive oil for a vegan option
- 1 tablespoon sugar
- 1 tablespoon balsamic vinegar optional
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Instructions
- Set your slow cooker to high. Add melted butter (or olive oil), sliced onions, and sugar (if using). Stir to coat the onions evenly.
- Prop the lid open slightly to allow steam to escape and cook for 6-8 hours on low, stirring occasionally, until onions are golden brown and soft.
- Add balsamic vinegar and sherry to deglaze the slow cooker. Stir well to pick up any browned bits.
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Notes
- Keeping the lid slightly open helps excess moisture escape, allowing the onions to caramelize rather than steam. If your slow cooker doesn’t allow this, you can prop it open with a wooden spoon.
- Stirring every few hours ensures even cooking and prevents burning at the edges.
- The sugar helps accelerate caramelization, but you can omit it if you prefer a more natural sweetness.
- Butter adds a rich depth of flavor, but olive oil is a great vegan alternative.
- Store caramelized onions in an airtight container in the fridge for up to one week, or freeze them in portions for up to three months for easy use in recipes.
- Keeping the lid slightly open helps excess moisture escape, allowing the onions to caramelize rather than steam. If your slow cooker doesn’t allow this, you can prop it open with a wooden spoon.
- Stirring every few hours ensures even cooking and prevents burning at the edges.
- The sugar helps accelerate caramelization, but you can omit it if you prefer a more natural sweetness.
- Butter adds a rich depth of flavor, but olive oil is a great vegan alternative.
- Store caramelized onions in an airtight container in the fridge for up to one week, or freeze them in portions for up to three months for easy use in recipes.
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