Rich Hungarian Mushroom Soup with Fresh Herbs (Cozy and Creamy)

Ingredients

• 4 tablespoons (56 g) unsalted butter
• 1 large yellow onion, finely chopped
• 1 1/2 lb (680 g) cremini mushrooms, sliced
• 1 teaspoon kosher salt, plus more to taste
• 3 cloves garlic, minced
• 2 tablespoons sweet Hungarian paprika
• 2 tablespoons chopped fresh dill, plus more for serving
• 1 teaspoon fresh thyme leaves
• 1/2 teaspoon black pepper
• 1/2 cup (120 ml) dry white wine
• 3 cups (720 ml) vegetable broth
• 1 tablespoon soy sauce or tamari
• 3 tablespoons all-purpose flour
• 1 cup (240 ml) whole milk, cold
• 1/2 cup (120 g) full-fat sour cream
• 1 tablespoon fresh lemon juice
• 2 tablespoons chopped fresh parsley
• Extra sour cream and paprika, for serving