Step 1

Preheat the oven to 400F°.

Step 2

In a large bowl, mix all the dry ingredients.

Step 3

Using the large holes of a cheese grater, grate the frozen butter into the flour. Mix well with flour.

Step 4

In a medium bowl, mix the buttermilk, egg and vanilla.

Step 5

Using a fork, slowly stir in the wet ingredients to the dry ingredients, until all the mixture is moistened.

Step 6

Do not over work the dough. Fold in the blueberries.

Step 7

Line a baking sheet with a silpat or parchment paper. Drop large spoonfuls onto the cookie sheet (to avoid tough scones, do not press or compact).

Step 8

Bake in the center rack 18 minutes. Remove and let them cool about 5 minutes before eating.