01 -
Melt the butter in a saucepan over medium heat.
02 -
Whisk in the flour and continue whisking for about a minute until a thick paste forms.
03 -
Gradually add the milk while whisking. Let this mixture cook uncovered until it has thickened.
04 -
Remove the saucepan from heat. Add the shredded cheese and salt, whisking continuously until the cheese is melted and the mixture is smooth.
05 -
Serve the cheese sauce immediately with soft pretzels or soft pretzel bites.