To make the beer cheese sauce, heat a small saucepan over medium heat and add butter. Once sizzling, whisk in flour and stir for 1 to 2 minutes until golden and fragrant and bubbly. Add in beer, whisking well to combine, then reduce heat to low (make sure it's low!) and add the cheese gradually, stirring until totally melted and smooth. Stir in the chipotle and adobo sauce. Sprinkle with smoked paprika or red pepper flakes and serve!