First, hand-grate your cheese and set it aside.
Add the butter to a medium saucepan on low heat. Once the butter is melted, add in the flour and stir for about 45 seconds to a minute.
Then, add in the beer, milk, salt, spices, mustard, and maple syrup and whisk for about 1 minute, or until mixture is warm.
If you have an electric stove, keep the burner on the lowest heat possible. If you have a gas stove, turn the heat off at this stage.
Slowly add in your cheese, whisking constantly. If you have an electric stove and the cheese isn't melting, turn the stove back on low heat for up to 30 seconds so that the mixture warms again.
Keep adding in all of your cheese until the mixture is totally melted.
Serve beer cheese with your favorite pretzels or chips.
Enjoy!