Melt Earth Balance in a large skillet or pan over medium heat. Then whisk in onion powder, garlic powder, and flour. Let it bubble, whisking occasionally for a few minutes to remove any floury taste.
Add broth, salt, pepper, and nutritional yeast. Whisk until smooth. Whisk in yogurt and reduce to low heat.
Adjust consistency to preference with more broth. Season to taste. Serve & Enjoy!