Crawfish Étouffée

Name: Crawfish Étouffée
Ingredients: 2 tsp. kosher salt; 1 tsp. cayenne pepper; 1 tsp. freshly ground white peppe; 1 tsp. freshly ground black pepper; 1 tsp. dried basil; 1⁄2 tsp. dried thyme; 3⁄4 cup canola oil; 3⁄4 cup flour, sifted; 1⁄4 cup finely chopped onion; 1⁄4 cup finely chopped celery; 1⁄4 cup finely chopped green bell pepper; 3 cups seafood or chicken broth; 12 tbsp. unsalted butter, cubed; 2 lb. peeled crawfish tails or peeled medium shrimp; 1 cup finely chopped scallions; Cooked white or yellow rice, for serving