Preheat oven to 400°F

Sift the flour, baking powder, salt and sugar in to a large mixing bowl. Add cold cubed butter and rub with your hands to break in to tiny bits. If it's too warm in your kitchen, like mine was on a freak 85° April morning, let the bowl sit in the freezer for a while to prevent the butter from melting. Add ham, scallions, and half the cheese and mix in with flour.

Make a well in the center of the flour and add all the milk and cream. Use a fork to mix the milk and flour until it comes together in larger clumps.

Dump dough on to a lightly floured surface and knead for a minute to fully combine all ingredients. Form in to a ball and lightly dust with flour. Using a rolling pin, shape the dough in to a flat disc about 1 inch tall.

Cut the dough in to 3 inch rounds. Place on a parchment paper lined baking sheet and cover each with the remaining cheese.

Bake for 25 minutes or until golden brown.