Soak the raw cashews in water for at least 4 hours, then drain and rinse.
In a blender, combine the soaked cashews, nutritional yeast, almond milk, lemon juice, garlic powder, onion powder, and turmeric powder. Blend until smooth and creamy.
Cook the elbow macaroni according to the package instructions. Drain and set aside.
In a large pot, combine the cooked macaroni and the creamy sauce. Stir well to coat the pasta evenly with the sauce.
Season with salt and black pepper to taste.
Serve immediately and enjoy your vegan mac and cheese!