Line a baking sheet with parchment or a silicone mat.
Weigh your coconut oil and place it in the fridge or freezer until solid.
Mix together the milk and apple cider vinegar and place in the fridge as well to curdle and stay cold. This will be the “buttermilk”.
Whisk together the flour, white and brown sugar, cinnamon, baking powder, baking soda and salt.
With your fingertips or a pastry cutter, rub the coconut oil into the dry ingredients until you get a bread crumb texture and there are no big chunks of coconut oil left. If the oil starts to feel soft or melt, stick the bowl in the fridge or freezer for 10 minutes until cold then continue.
Add the raisins and walnuts and stir them in.
Pour in the “buttermilk” and, starting with a spatula, stir the mixture until a rough dough forms.
Tip it out onto a very lightly floured surface and give it just enough kneads for the dough to hold it’s shape. I like to do this by giving it a few folds.
Shape the dough into a circle about 2cm/1.5 inches thick and cut it into 6 even triangles. If you prefer smaller scones, shape the dough into a square or rectangle about the same thickness and cut into squares the size you want.
Place them on the baking sheet about an inch apart and put them in the fridge for 30 minutes.
Preheat your oven to 180°C/350°F. Brush the tops of the scones with the glaze and sprinkle coarse sugar on top.
Bake them for 20-25 minutes then place them on a cooling rack until you can enjoy without scorching your mouth.