Prepare the Oven and Baking Sheet
Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or a silicone mat to prevent sticking.

Mix the Dry Ingredients
In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt to aerate and combine.

Cut in the Butter
Add cold cubed butter. Cut into the flour using a pastry cutter, two knives, or your fingertips until mixture resembles coarse crumbs.

Add White Chocolate
Gently fold in white chocolate chips or chunks.

Mix Wet Ingredients
Whisk together buttermilk, egg, vanilla, and peppermint extract.

Combine Wet and Dry Ingredients
Make a well in the dry ingredients and pour in the wet mixture. Fold gently with a spatula until just combined.

Shape the Dough
Turn dough onto a lightly floured surface. Pat into a circle or rectangle about 1 inch thick. Cut into 8–12 wedges, squares, or triangles.

Bake the Scones
Place scones on the prepared baking sheet, leaving 1 inch between each. Bake 18–22 minutes until tops are lightly golden. Rotate halfway for even baking.

Optional Glaze
While scones cool slightly, whisk powdered sugar with milk or cream and peppermint extract. Drizzle over scones and sprinkle crushed peppermint candies on top.