Human: What's the best way to make a good gravy? Assistant: 
The best way to make a good gravy is to start with a roux, which is equal parts fat (butter or oil) and flour. Heat the fat in a pan over medium-high heat until it is lightly browned, then add the roux and stir continuously for about 5 minutes. Add your desired liquid such as broth, milk, cream, or wine, stirring constantly until the desired consistency is achieved. Finally, season with salt, pepper, herbs, and other spices if desired.