Ingredients
- For the soup:
- 2 tablespoons unsalted butter
- 1 yellow onion, finely chopped
- 3 garlic cloves, minced
- 1 tablespoon all-purpose flour
- 2 pounds russet potatoes (about 3-4 large ones), peeled and cubed
- 3 cups whole milk
- 3 cups vegetable stock or water
- 2 teaspoons kosher salt, plus more to taste
- 1 sprig fresh rosemary
- 3 sprigs fresh thyme
- 1/2 cup sharp white cheddar cheese, shredded
- 1/4 cup Parmesan cheese, shredded
- 1/4 teaspoon smoked paprika
- 1/2 teaspoon cayenne
- Crème fraîche, sour cream, or Greek yogurt, for serving
- For the peppered scallion topping:
- 2 tablespoons extra-virgin olive oil
- 20 scallions (about 2 handfuls)
- 8 tablespoons (1 stick) unsalted butter
- 2 teaspoons lemon zest
- 1 1/2 tablespoons freshly squeezed lemon juice
- Kosher salt, to taste
- 1 tablespoon freshly ground black pepper
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