Ingredients
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 3 large yellow onions thinly sliced
- 1/2 teaspoon salt
Instructions
- Melt butter with olive oil in a large skillet over medium heat until the butter is foamy.
- Add the sliced onions and stir to coat with the butter and oil mixture. Sprinkle with salt.
- Reduce heat to medium-low and cook, stirring occasionally, for about 50 minutes to 1 hour. The onions should become deeply golden brown and very soft.
- If the onions begin to stick or burn, add a tablespoon of water to the skillet and stir to loosen the caramelized bits.
