Ingredients:
2 tablespoons (1/4 stick) butter
2 tablespoons flour
1 tablespoon dry mustard
1/4 to 1/2 teaspoon cayenne
1/2 cup dark ale or dark beer
1 tablespoon Worcestershire sauce
1 pound sharp cheddar, grated
4 to 8 slices of toasted bread
In a saucepan melt butter over medium heat. Stir in flour, continuously stirring for 3 to 5 minutes, until light golden brown. Stir in mustard and cayenne, then whisk in beer and Worcestershire sauce. When mixture is uniform, turn heat to low and stir in cheese, again stirring until smooth. Remove from heat and pour into a shallow broad container to set (you can refrigerate for up to a day).
Spread mixture thickly on toast and put under broiler until bubbly and slightly brown in spots. Serve immediately.