Air Fryer Walnut Shortbread Cookies

Mix together the egg, softened butter, sugar, flour, and baking powder.

Fold the chopped nuts into the prepared dough.

Divide the dough into small 25g balls, dip one side of each ball well into flour, gently press the other side with a fork, and place them on the air fryer rack.

Cook using the Multicook function at 180°C (350°F) for 9 minutes.

Carefully remove the finished cookies and let them cool; while hot, they are extremely fragile.

Immediately start making the berry drink: place the berries, sugar, and water in a saucepan, and cover with a lid.

Turn the stove to maximum power and bring the drink to a boil.