Add in coconut milk, broth, nutritional yeast, garlic powder, thyme, rosemary, salt, and pepper, and continuously whisk for 5 minutes or until the sauce begins to thicken and turn opaque. Remove from heat.
1 1/2 cup full-fat coconut milk, 1/2 cup vegetable broth, 1/3 cup nutritional yeast, 1 tbsp garlic powder, 1 tsp thyme leaves, 1/2 tsp rosemary, 1 tbsp sea salt, 1/2 tsp ground black pepper