All-Purpose Gravy | America's Test Kitchen

Ingredients

• 1 small carrot, peeled and chopped into rough 1/2-inch pieces (about 1/2 cup)
• 1 small rib celery, chopped into rough 1/2-inch pieces (about 1/2 cup)
• 1 small onion, chopped into rough 1/2-inch pieces (about 3/4 cup)
• 3 tablespoons unsalted butter
• 1/4 cup unbleached all-purpose flour
• 2 cups low-sodium chicken broth
• 2 cups low-sodium beef broth
• 1 bay leaf
• 1/4 teaspoon dried thyme
• 5 whole black peppercorns