Directions

1. Heat the oven broiler to medium. Melt the butter in a medium sauce pot over medium heat. Add the flour and cook, stirring frequently, until golden brown, about 4 minutes.
2. Continue to cook, stirring occasionally, until golden brown and very fragrant, 3 to 5 minutes. Stir in mustard and hot sauce, then whisk in beer and Worcestershire sauce.
3. Whisk the cornstarch into the heavy cream, then add to the sauce. Bring the sauce to a simmer to thicken.
4. When mixture is uniform, turn heat to low and stir in cheese, again stirring until smooth. Remove from heat and pour into a broad container to set (you can refrigerate for up to a day at this point).
5. To serve, spread mixture thickly on toast and put under broiler until bubbly and edges of toast are crisp. Garnish with chives and serve immediately.