A rich and savory Mushroom Gravy Recipe with Guinness, made with mushrooms, onions, butter, flour, and stout. Perfect for pairing with mashed potatoes, biscuits, beef, or pork.
Place the mushrooms and onions in a dry cast iron skillet over medium-low heat. Cook for approximately 10 minutes, stirring occasionally, until softened and lightly browned.
Prepare the roux:
Add the Dijon mustard, butter, and flour to the pan. Stir thoroughly and cook over medium heat for about 5 minutes, allowing the flour to cook and the mixture to become fragrant.
Incorporate the Guinness:
Reduce the heat to medium-low. Add half of the Guinness stout to the pan and whisk until fully incorporated. Add the remaining stout and whisk again until smooth.
Add milk and simmer:
Pour in the whole milk while whisking continuously. Allow the mixture to simmer for 5–10 minutes, or until the gravy thickens to your desired consistency.
Season and finish:
Remove the pan from the heat. Stir in the celery salt, black pepper, and Worcestershire sauce. Garnish with parsley, if desired, before serving.
Notes
To make this recipe gluten free, substitute the all-purpose flour with a gluten-free flour blend or cornstarch slurry (1 Tbsp cornstarch mixed with 2 Tbsp water). Ensure the Worcestershire sauce used is certified gluten free.