Using a box grater, grate the onion and set it aside.
½ medium onion
Rinse off the grater and then use it to grate the block of cheese. You can also use a food processor to grate your cheese.
3 cups cheddar
Add the unsalted butter to a medium saucepan set to medium heat. Add the grated onions and a little bit of salt. Caramelize the onions until they are lightly golden brown. About 15 to 20 minutes. Nice and slow.
½ medium onion, 2 tablespoons butter
Add the garlic and sauté for approximately 3 to 5 minutes.
2 cloves garlic
Sprinkle over the flour and allow it to brown for a few minutes. Watch the flour closely and stir it often while it is browning.
2 tablespoons flour
Add the beer to the saucepan and bring it to a boil. You want to burn off the alcohol from the beer. We want beer flavor but not boozy cheese.
½ cup beer
Add in the milk or cream and bring the cheese sauce to a simmer.
1 cup heavy cream
Add in the grated cheese and stir until it is melted.
3 cups cheddar
Add in the mustard and stir to combine.
1 tablespoon dijon mustard
Adjust the seasoning by adding it a little hot sauce, cayenne pepper, or Worcestershire sauce.
Video
RECIPE TIPS
Use block cheese for best results. Preshreded cheese doesn't melt as well.
Optional things that you can add to beer cheese
Hot sauce. I recommend Crystal brand or Tabasco.
Cayenne pepper. If you like things spiy a sprinkle of cayenne will give you a little kick of spiciness.
Cream Cheese or American Cheese. A few tablespoons of cream cheese can add an extra creaminess to this cheese sauce. Cream cheese or Velvetta American cheese helps to stabilize the sauce so that it stays smoother.
Worcestershire sauce. A tablespoon of Worcestershire sauce can add an extra layer of umami to beer cheese.