Add flour, baking powder, cocoa powder & coffee granules/powder, to a medium-sized mixing bowl. **Remember to add the 2 amounts of baking powder if using Plain/All Purpose flour. Whisk briefly together before adding in the softened cubed butter.
Mix the dry ingredients with the butter, before you 'Cut the butter' into the flour with a Pastry Cutter (Pastry Blender), until the mixture resembles large breadcrumbs. Alternatively use 2 butter knives, or rub between your fingertips. (For more details, read before this Recipe Card or watch the video below). Pieces don't all need to be the same size or take too long to do. Add in the sugar and mix through.
Add 240ml (1 cup, 8 fl oz) milk to a measuring jug, before adding in the eggs and whisking together. (**If you want to make similar to buttermilk, add 1 tbsp vinegar or lemon juice to the milk & leave 5 minutes till it looks 'curdled'). Check the level of the mixture now that the eggs have been added and top up with more milk to the 350ml (shy of 1½ cups, 11¾ fl oz) level if required. If you have more it is fine too. Reserve 2 tbsps of the mixture to a small bowl for egg-washing the scones.
Make a reservoir in the centre of the mixing bowl before adding in a little of the egg/milk mixture and mixing with a large spoon or spatula. Gradually adding in more liquid, being careful to check for dry patches underneath. Once a darker brown colour and starting to come together, use your hands to knead together into a rough dough. Add the Vanilla Extract, Orange extract & half of the chocolate chips, before working them into the dough. Add the second lot of chocolate chips. You want a slightly sticky dough. You might not need all the egg/milk mixture or need a touch more milk. DO NOT USE A FOOD PROCESSOR OR MIXER.
Dust some baking/parchment paper with cocoa powder to work on, before forming the dough into a disc shape. Place on the dusted paper & use your hands to open out the dough to a thickness of at least 1" (2½cm). Do not use a rolling pin.
Dip your cookie cutter into a dish of cocoa powder before cutting out the scones. DO NOT TWIST THE COOKIE CUTTER! This is very important for a good rise. Cut as many as you can before pulling away the excess scone dough. Use a palette knife to carefully transfer the scone to the prepared paper in the air fryer basket (don't touch the sides of the scone).
Once you have enough in the air fryer basket, carefully brush a little of the reserved egg-milk mixture on top of the scone. Tap excess off brush and brush from the centre of the scone outwards, being careful not to let any drip down the sides of the scone.