Pre-heat your Ninja Foodi, on the air fryer setting, at 200C (390F) while you prepare the scone dough.
Combine the flour and butter together, rubbing between your fingers until you get a breadcrumb like consistency.
Add a pinch of salt and the baking powder.
Add the sugar and sultanas.
Mix lightly until combined.
Add the milk.
Mix again.
Divide the mixture into 4 equal sized pieces.
Line your air fryer basket with parchment paper (baking paper).
Add each of the 4 pieces of dough, lightly shaped if you like.
Personally I love to go for drop scones, where you just place the scone mixture in without worrying about shaping them.
If your mixture is a little too wet to shape well, and you'd like to do this, then you can add 5g more flour to get a slightly drier consistency and then use a cookie cutter.
Air fry at 200C (390F approx) for 8-10 minutes. Use a cake tester to check that the scones are cooked through before serving. When it comes out clear the scones are ready and perfect for serving.