How to Caramelize Onions
Learn the art of caramelizing onions to perfection. This simple technique transforms sharp, pungent onions into sweet, silky golden strands using just three ingredients and patience.
Ingredients
- 2 tablespoons extra-virgin olive oil high-quality makes a difference
- 4 yellow onions medium, halved and sliced
- 1/2 teaspoon sea salt adjust to your taste
Instructions
Slice Those Onions
- Cut your onions into even slices about ΒΌ-inch thickness. Consistency really matters here for uniform cooking. After slicing, pull apart the onion rings and spread them out.
Start the Heat
- Pour olive oil into a 12-inch cast-iron skillet. Turn the heat to medium and wait for the oil to shimmer slightly.
- Add all your sliced onions at once. Don't panic at the huge pile - onions will reduce to about a quarter of their original size. Stir everything to coat the onions with oil.
The First Five Minutes
- Keep stirring frequently for five minutes until onions start to soften and become more translucent.
- After these first five minutes, add the salt. Stir it in well to draw out moisture and boost flavor.
The Long Wait (This Is Where Magic Happens)
- Reduce your heat to medium-low. Cook the onions for 50 to 80 minutes, stirring every few minutes. Don't walk away completely.
- If onions stick hard to the pan, lower the heat. If the pan looks dry, add a tablespoon of water to deglaze and scrape up the flavorful fond.
The Final Push
- Around the 50-minute mark, check your onions. They should be much smaller with color shifting from pale yellow to beautiful golden brown.
- If not deep enough, bump up the heat slightly and stir constantly. The higher heat speeds up that final caramelization. Continue until onions are deep golden to light brown, silky and jam-like in texture.
Notes
Storage: Let cool completely, then store in an airtight container in the fridge for up to a week. For freezing, use ice cube trays for portions. Once frozen solid, transfer to freezer bags. They'll last two months.
Variations: Add 1 tablespoon balsamic vinegar in the last 5 minutes for sweet-tangy flavor. Throw in fresh thyme sprigs while cooking for herb-infused onions. Mix yellow and red onions for color and flavor complexity.
Equipment: Cast-iron skillet recommended for best results. A 12-inch pan is ideal for 4 onions to prevent crowding.