Start by gathering all your ingredients to ensure a smooth process. In a large bowl, combine the cake flour, white sugar, baking powder, baking soda, mixed spice, cinnamon, ground ginger, and salt. Use a whisk to blend these dry ingredients thoroughly, ensuring there are no lumps.
Next, add the cold butter to your dry mixture. Using your fingers or a pastry cutter, rub the butter into the flour mixture until it resembles fine breadcrumbs. It’s okay if there are a few larger pieces of butter left; they will melt during baking, creating pockets of richness.
Now, fold in the raisins, sultanas, and dried citrus peel into the mixture. This adds sweetness and a burst of flavor to each scone. Make sure they are evenly distributed throughout the flour mixture.
In a separate bowl, mix the vanilla extract with the buttermilk. Stir this mixture well, as it will add moisture to your dough. Pour the buttermilk mixture into the dry ingredients and gently stir with a spatula until just combined. Do not overmix; it’s fine if it looks a bit crumbly.
Turn the dough out onto a lightly floured surface. Gently knead it a few times until it comes together. Your goal isn’t to overwork the dough, so be gentle! Form it into a thick disk, around 2.5 to 3 cm high.
Using a sharp knife, cut the disk into 8 triangles, similar to how you would slice a pizza. Alternatively, you can use a 5 cm to 6 cm cookie cutter to create round scones. Gather any remaining dough, press it together, and cut additional scones until all the dough is used.
Beat the egg in a small bowl and brush the tops of the scones with the egg wash. This will give them a lovely golden color as they bake. If you like, sprinkle a little sugar on top for added sweetness and a crunchy texture.
Transfer the scones onto a lined baking sheet. For best results, place them in the fridge for about 20 minutes while you preheat the oven to 200°C (400°F). Chilling the scones will help them rise better.
Once your oven is preheated, bake the scones for 20 to 22 minutes, or until they are golden brown and well risen. To prevent them from over-browning, you can cover them loosely with aluminum foil midway through baking.
Once baked, remove the scones from the oven and let them cool on a wire rack. Enjoy them warm or at room temperature with a dollop of butter or your favorite jam!