Preheat the oven to 350F / 180C and line a large baking sheet with parchment paper.
Sift the flour and baking powder into a mixing bowl.
Lightly rub the butter in the mixture with your fingertips until the mixture resembles fine breadcrumbs.
Now, mix in the sugar and dried fruit until incorporated.
Mix in the egg and a tablespoon of the milk, and whisk with a fork to combine (if the mixture is still dry, add another tablespoon of milk, until the dough holds together).
Divide the mixture into ¼ cups and put them in the baking pan. Sprinkle with Demerara sugar.
Bake in the oven for 15-20 minutes or until golden brown.
Notes
Do not overmix the batter. You want to mix the batter just until all ingredients are well incorporated.