Heat the avocado oil in a medium saucepan over medium heat.
Add the flour and whisk continuously for 1-2 minutes to create a smooth roux. This step ensures your sauce will be thick and silky.
Stir in the chili powder, garlic powder, cumin, and oregano. Whisk for 1 minute to toast the spices and release their flavors.
Gradually pour in the chicken or vegetable stock, whisking constantly to avoid lumps.
Bring the mixture to a simmer and reduce the heat to low. Allow it to cook for 8-10 minutes, stirring occasionally, until the sauce has thickened slightly.
Taste the sauce and add fine sea salt as needed to enhance the flavor.
Use the sauce immediately or store it for later use.