Step 1

Preheat oven to 400°F.

Step 2

Combine flour, sugar, baking powder, salt and baking soda in the bowl of food processor fitted with metal blade. Pulse several times to combine.

Step 3

Add the cold butter and pulse quickly until mixture resembles coarse meal.

Step 4

Add egg and buttermilk and pulse just until mixture comes together in clumps. The dough should be a bit sticky.

Step 5

Dust a work surface lightly with flour, then dump scone dough onto surface. With lightly floured hands, press dough into ball. On a floured surface, knead gently 10 times.

Step 6

Press dough into a flat circle about 3/4-inch high, then use a sharp knife to cut into 12 wedges.

Step 7

Place scones on a baking sheet lined with parchment paper.

Step 8

Bake for 18 to 20 minutes or until golden. Transfer to a rack and allow to cool completely.

Step 9

Serve warm with butter or jam.

Step 10

Store in airtight container at room temperature for up to 1 day.