For best texture, keep the butter cold until the moment you add it to the flour.
Do not over-knead the dough, as this will make the scones tough instead of tender.
These scones are best served fresh. If storing, keep in an airtight container at room temperature for up to 2 days. Reheat in the oven for a few minutes to restore crispness.
Substitute raisins with dried cranberries, currants, or blueberries for a variation.