2 1/2 cups all-purpose flour, plus more for dusting (see Cook's Note)
2 tablespoons baking powder
1 tablespoon sugar
Kosher salt and freshly ground black pepper
1 1/2 sticks (12 tablespoons) unsalted butter, cut into small pieces and frozen
4 ounces pepper jack cheese, grated
1 small bunch fresh chives, thinly sliced
1 cup buttermilk, plus more for brushing
Nonstick cooking spray, for the baking sheet
6 round slices Black Forest ham
6 large eggs
When measuring flour, we spoon it into a dry measuring cup and level off the excess. (Scooping directly from the bag compacts the flour, resulting in dry baked goods.)