Stir apples, 125g caster sugar, cinnamon, cloves and nutmeg together; distribute apple mixture into a deep-sided baking dish.
Whisk flour, remaining 200g caster sugar, baking powder and salt together in a bowl. Stir egg, cream and melted butter together in a cup; pour egg mixture into flour mixture and stir until all ingredients are moistened. Using the back of a spoon, spread cobbler mixture over apple mixture to seal apples in completely.
Bake in the preheated oven until golden brown on top, about 50 minutes.