Step 1

In a medium saucepan, melt the butter over low heat.

Step 2

Once melted, add the flour and whisk until combined. Cook for 3-4 minutes, stirring occasionally.

Step 3

Add the beer and stir until combined. Then add the dry mustard and stir until combined.

Step 4

Add the cheese and stir until melted. Then add the milk, stirring until combined.

Step 5

Continue to cook over low heat for 8-10 minutes, stirring occasionally, or until the sauce has thickened to your desired consistency.

Step 6

Serve immediately.