- 1 tablespoon butter
- 1 tablespoon olive oil
- 1 teaspoon thyme
- 2 large onions, sliced
- 1 cup chicken broth
- 1 cup apple cider
- 1/4 cup grated Parmesan cheese, or to taste (optional)
- Melt butter with olive oil and thyme in a pot over medium-low heat. Cook and stir onions in butter mixture until caramelized, about 20 minutes.
- Pour chicken broth and apple cider into pot; simmer mixture for 20 minutes. Garnish with Parmesan cheese.