Preheat the oven to 400F.
Using a pastry brush, coat a large baking sheet with the softened butter and set it aside, or cover the baking sheet with parchment paper.
In a large chilled mixing bowl, sift the flour and baking powder. Add the sugar and salt.
Add the butter bits and using your fingers, rub the flour mixture and butter together until they look like flakes of course meal.
If you want to add chocolate chips or dried fruits, this is the moment to toss them in the flour mixture.
Use a whisk to beat the egg separately in a small bowl. Add the heavy whipping cream and the vanilla extract.
Pour the liquid over the flour mixture. With your hands, toss together until the dough can be gathered into a compact ball. Do not knead.
Lightly flour a surface and roll the dough out about a 1-inch thick circle.
Use a cookie cutter or the rim of a glass, cut the dough into 2-inch rounds.
Reroll and cut the scraps into similar rounds. Place the rounds about 1 inch apart on the baking sheet.
Bake for about 15 minutes or until lightly brown.
Serve it with Devonshire Cream and your favorite jam.