{Soufflé Au Fromage} Classic Gruyere Cheese Soufflé Recipe

Ingredients

• 3 tablespoons unsalted butter (plus more to coat the baking dish)
• 3 tablespoons finely grated Parmigiano-Reggiano cheese (plus more for coating the baking dish)
• 1 cup whole milk (or half-and-half)
• 4 fresh thyme sprigs (or parsley or marjoram (optional))
• 1/2 medium shallot (or 2 garlic cloves (optional))
• 4 black peppercorns ((optional))
• 1 bay leaf ((optional))
• 3 tablespoons all-purpose flour (or gluten free all purpose flour)
• 4 egg yolks (room temperature)
• 6 egg whites (cold)
• 1/2 teaspoon cream of tartar ((optional))
• 4 ounces shredded Gruyere, aged Cheddar, or aged Gouda (or Comté cheese )