Preheat your oven to 400°F (200°C).
In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking soda, baking powder, and salt until well combined.
Grate the frozen unsalted butter into the flour mixture and use a pastry cutter to incorporate the butter until the mixture resembles coarse crumbs.
In a separate bowl, whisk together the Greek yogurt, heavy whipping cream, egg, and vanilla extract until smooth.
Pour the wet mixture into the dry ingredients and gently fold until just combined.
Gently fold in your favorite mix-ins.
Turn the dough onto a floured surface and pat into a circle about 1 inch thick. Cut into wedges.
Transfer the scones onto a baking sheet lined with parchment paper and bake for 15-20 minutes until golden.
While baking, whisk together the powdered sugar and milk until smooth for the glaze.
Once baked, cool on a wire rack and drizzle the glaze over the warm scones.
