STEP 1
In a large mixing bowl, sift the all-purpose flour and salt together.
Cut the shortening and butter into small cubes and add them to the flour. Use your fingertips to rub the fats into the flour until the mixture resembles fine breadcrumbs.
Make a well in the center and add the beaten egg, water, apple cider vinegar, and sugar. Mix until it forms a smooth dough. If the dough feels dry, add a little more water, a teaspoon at a time.
Wrap the dough in cling film and chill in the refrigerator for at least 30 minutes.
STEP 2
In a separate bowl, mix the currants with the caster sugar and melted butter until well combined.
STEP 3
Spoon a portion of the currant filling onto the center of each rolled-out dough circle.
Fold the edges of the dough over the filling and pinch to seal, then flatten gently with a rolling pin to ensure the filling is evenly distributed.
STEP 4
Spoon a portion of the currant filling onto the center of each rolled-out dough circle.
Fold the edges of the dough over the filling and pinch to seal, then flatten gently with a rolling pin to ensure the filling is evenly distributed.
STEP 5
Brush each cake with milk or beaten egg white. If desired, sprinkle a little caster sugar on top for extra sweetness.
Place the cakes on a parchment-lined air fryer basket, ensuring they do not touch.
STEP 6
Bake in the preheated air fryer at 360°F (180°C) for 15–20 minutes or until golden brown and crisp.
Allow the cakes to cool slightly before serving.