Add the broth or drippings to the slow cooker, set to high. Then make a roux in a pan by whisking together the butter and milk in a pan.
2 cups Beef drippings, ¼ cup Flour, ¼ cup Butter
Once the roux has bubbled for about 5 minutes, pour in about 1 cup of the drippings, then whisk well to combine.
Pour the roux and broth mixture back into the slow cooker and whisk well, then cover and cook 30 minutes to an hour, until thick. Season with salt and pepper, and serve!
Salt and pepper
Video
Notes
This recipe can easily be made gluten free by using gluten free flour for the roux. Or, skip the roux and replace it with a slurry of 1 Tablespoon cornstarch and 1 Tablespoon water, mixed together until smooth.
This gravy is delicious on its own, but I also love adding sauteed mushrooms, caramelized onions, and herbs. These additions will really spruce up a gravy made from only broth.
Be sure to whisk the roux often and not overcook it- if the flour darkens, it won't thicken the gravy as much.