Ingredients
1/4 cup unsalted butter
1/4 cup plus 1 tablespoon all-purpose flour
3 cups cold milk
small pinch of nutmeg
1/4 teaspoon dry mustard
1/4 teaspoon cayenne, or to taste
1/4 teaspoon dried thyme, or few springs of fresh
1 1/2 teaspoons table salt, or to taste
Cheeses I used:
1/2 pound shredded extra-sharp cheddar cheese
1/4 pound shredded Gruyere cheese
For the potato chip topping:
1 tablespoon butter
1 bag (minus 6-7 chips) white cheddar kettle-style potato chips, crushed into medium-fine crumbs
1/3 cup finely grated Parmigiano-Reggiano (real Parmesan cheese)
2 tablespoons plain breadcrumbs
Preparation
https://www.youtube.com/watch?v=lPbmir3irxg