Tortellini in Frizzled Onion Broth
Published March 16, 2026
- Ready In
- 30 min
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Ingredients
For the soup
2 tablespoons salted butter
2 tablespoons olive oil
1 medium yellow onion, thinly sliced
3 garlic cloves, smashed
2 ounces shiitake mushroom caps, thinly sliced
Kosher salt
Coarsely ground black pepper
2 tablespoons sherry vinegar
4 cups good-quality chicken, beef, or vegetable broth
10 ounces cheese tortellini
Optional toppings
Thinly sliced chives
Finely grated Parmesan or pecorino Romano
Crusty bread or sourdough croutons
Preparation
- Step 1
Heat a medium pot over medium-high. Add butter and once beginning to foam, add olive oil. Swirl to combine, then add onion, garlic and mushrooms. Season with salt and pepper, and cook, stirring often, until onions are deeply browned (nearly burned), 12 to 15 minutes.
- Step 2
Add the vinegar to deglaze, scraping up any browned bits. Add stock (and, for a brothier bowl, 1 cup water), increase heat to high and bring to a boil. Taste and season with salt as needed.
- Step 3
Add the tortellini, stir to ensure they don’t stick and cook to the lower time range of the package directions or until just shy of al dente.
- Step 4
Divide soup between bowls and top with chives and Parmesan, if using, and more freshly ground black pepper. Serve with crusty bread or sourdough croutons if desired.
Soup (without the tortellini) can be made and stored in the refrigerator up to 2 days in advance. Bring to a boil, and cook tortellini just before serving.
Private Notes
