INGREDIENTS
•
1 cup water
•
8 tablespoons unsalted butter
•
1/2 teaspoon kosher salt
•
1/4 teaspoon granulated sugar
•
1 teaspoon dry mustard
•
A pinch of cayenne pepper
•
1 cup (5 ounces) all-purpose flour
•
2 large eggs
•
2/3 cup (2 1/2 ounces) grated gruyère cheese