
Add the butter to a small saucepan over medium heat.
Once the butter is melted add the gluten-free flour (or cornstarch slurry) to the pan and stir until combined to make a roux. Whisk for 2-3 minutes, until the butter turns golden brown and the gluten-free flour is fully dissolved and clump-free.
Add the gluten-free broth to the roux (butter mixture), stirring constantly with a whisk, and bringing to a boil.
Boil for 1 minute and season with salt, pepper, and thyme (optional).
Serve warm and enjoy!