Holiday Potato Casserole with Gouda, Garlic, and Thyme | America's Test Kitchen

Ingredients

• 8 ounces Gouda cheese , shredded (about 2 cups)
• 4 medium cloves garlic , minced (about 1 1/2 tablespoons)
• 4 teaspoons minced fresh thyme leaves
• 2 tablespoons unsalted butter
• 1/4 cup unbleached all-purpose flour
• 3 1/2 cups chicken stock or canned low-sodium chicken broth
• 1 bay leaf
• 2 pounds Yukon Gold potatoes , peeled and sliced 1/8 inch thick
• 2 pounds russet potatoes , peeled and sliced 1/8 inch thick
• 3/4 teaspoon kosher salt
• 3/4 teaspoon ground black pepper