5-Min Caramelized Onions Air Fryer – Sweet & Golden
Sweet, soft, and golden caramelized onions made easily in the air fryer with minimal effort. No standing at the stove, no constant stirring—just rich, deep flavor perfect for burgers, sandwiches, steaks, and more.
Equipment
- airfryer
Ingredients
- 1 large onion yellow, sweet, or red, sliced
- 1 tbsp olive oil
- 1 tbsp butter melted
- Salt & black pepper to taste
- Optional Add-Ins:
- Pinch of brown sugar extra sweetness
- Splash of balsamic vinegar rich, tangy finish
Instructions
- Preheat Air Fryer: Set air fryer to 300°F (150°C) and preheat for 3–5 minutes.
- Slice the onions: Peel and slice onions into ¼-inch thick strips for even cooking.
- Season the Onions: Add onions to a bowl. Pour in olive oil and melted butter. Season with salt and pepper. Toss until evenly coated.
- Air Fry: Transfer onions to the air fryer basket. Cook for 20–30 minutes, stirring every 10 minutes to prevent burning and ensure even caramelization.
- Check & Finish:Onions are done when soft, reduced, and deep golden brown. Cook a few extra minutes if needed.
- Serve & Enjoy: Use immediately or store for later.
Notes
📝 Notes
💡 Tips & Variations- Add minced garlic during the last 5 minutes for extra flavor
- Skip butter and use olive oil only for a vegan version
- Use half the amount if substituting white sugar for brown sugar
- Top burgers, steaks, or grilled chicken
- Add to grilled cheese or sandwiches
- Stir into mashed potatoes or casseroles
- Use on flatbreads, tarts, or dips
Keep in an airtight container in the fridge for up to 5 days. Freeze:
Freeze in small portions for up to 3 months. Reheat:
- Air fryer: 300°F for 2–3 minutes