Gravy for Roast Heritage Turkey | America's Test Kitchen

Ingredients

• 2 teaspoons vegetable oil
• 4 tablespoons unsalted butter
• 1 small onion , sliced thin
• 1 celery rib , sliced thin
• 1/4 cup all-purpose flour
• 1/2 cup dry white wine
• 4 cups chicken broth
• 3 cups water
• 3 bay leaves
• Reserved turkey backbone and neck from recipe