In a saucepan:
2 tablespoons butter
1 jalapeno, small diced
2 tablespoons flour
On the sidelines:
Half a bottle of beer, about 6 ounces (I used a lager but feel free to get creative!)
Block of sharp cheddar cheese, grated, about 8 ounces
In a medium pot, melt the butter and cook the jalapeño for a few minutes.
Add the flour and stir to form a paste. Cook for about two minutes.
Add the beer and stir to combine everything well.
Add the cheese and stir until melted and thick. Cook until desired thickness, for me, about five minutes.