-1 3/4 cup all-purpose flour-3 tsp baking powder-1/2 tsp salt-3 tbsp sugar-6 tbsp salted butter, cold and cut into slices-1/3 cup sour cream-5 tbsp milk, plus some extra for brushing on scones before they bake-1 large egg-3/4 cup chopped datesturbinado sugar
In a separate small bowl or large measuring cup, whisk together the egg, milk and sour cream, then pour into the bowl with the dry ingredients and butter. Stir until a crumbly dough forms.
Turn the dough out onto a work surface. Knead the dough by folding the edges over and pressing. Keep going until it gets easier to knead cleanly and do so until a fairly smooth dough forms.
Bake for 17-18 minutes, until slightly golden on top and beginning to brown around the bottom edges. Remove from oven and transfer to a wire baking rack to cool.