Step 1

Add the butter to a large sauté pan over medium heat and allow it to melt. As soon as the butter has melted, add the flour and whisk for 1-2 minutes.

Step 2

Add the beef broth one big splash at a time, whisking well after each addition. Once the mixture resembles the texture of pudding, you can go ahead and add all the remaining broth and whisk to combine. All the mixture to simmer for about 3 minutes, just until slightly thickened.

Step 3

Add the remaining ingredients, whisk, and all the mixture to come back to a simmer. Then, allow to simmer 5 minutes more.