To a small bowl, add the spices – chili powder through cumin – then stir to combine and set aside.
Heat the oil in a medium-size saucepan over medium heat then add the flour and cook while whisking constantly for 1 minute.
Add the seasonings then whisk until they’re toasted and very fragrant, 30 seconds. Switch to a spatula then add the tomato paste and mash it in with the seasonings to create a thick paste.
Switch back to a whisk then slowly stream in the chicken stock or broth while whisking to create a smooth sauce. Turn the heat up to medium-high then bring the sauce to a simmer while stirring slowly and constantly with a spatula. Once simmering, turn the heat back down to medium then simmer for an additional 1 to 2 minutes or until the sauce has thickened (sauce will continue to thicken as it cools). Cool slightly before using.