
5 eggs
3 tablespoons unsalted butter, softened, plus more for greasing ramekins
2 tablespoons sugar, plus more for ramekins
3 tablespoons all-purpose flour
1 cup milk (room temperature)
1⁄8 teaspoon salt
Pinch ground white pepper
Pinch ground nutmeg
1⅓ cups havarti cheese, shredded
2 tablespoons crumbled blue cheese
1⁄8 teaspoon cream of tartar
Confectioners' sugar for dusting