Baby Swiss Cheese Fondue Recipe

Melt butter in a saucepan over low heat. Whisk flour and salt into butter until mixture is smooth and bubbly about 1 minute. Remove from heat and whisk milk into butter mixture.

Bring mixture to a boil whisking constantly; cook at a boil for 1 minute. Stir in mustard.

Reduce heat to low and stir Swiss cheese into milk mixture 1/4 cup at a time until cheese is melted and fondue is smooth 5 to 10 minutes.