Preheat the oven to 170°C (338°F) fan.
Mix the eggs, sugar, and vanilla paste in a large bowl.
Whisk for two minutes until light and fluffy.
Add half the melted butter and half the flour and stir.
Add the remaining butter and flour, as well as the baking powder.
Fold in the chopped apples.
Add the batter to a lined baking tin.
Mix the ingredients for the filling.
Spread out blobs of the filling on top of the entire cake. I like to use two teaspoons for this.
Bake for 43-45 minutes until golden and baked through.
Allow the cake to cool for 10 minutes in the tin.
Serve with ice cream, whipped cream, or sour cream.