Preheat your oven at 180 degrees celsius

Soften the butter till almost liquid in a pan or microwave and put in a large round bowl suitable for mixing

Add the dark sugar with the vanilla sugar and mix smooth

Add the eggs one by one and mix smooth, if possible electrical

Mix the flower with the baking powder and salt (if you use the cinnamon or speculaas spices, mix them in now), then use a sieve to sieve it over the rest of the ingredients in the bowl

Now use a spatula to manually fold and mix it in together smooth

Peel the apples, remove the core and cut into pieces (if you use the lemon sprinkle the juice and grated peel over the apple)

Grease the whole inside of the springform with butter and add some flower. Move the springform around so the flower shortly has touched the butter surface and sticks all around

Add the dough to the springform and try to make an even layer that touches the edges using the spatula or another suitable tool

Add the pieces of apple as one layer on top of the dough but make sure there is a 1cm free space all around the edges

Sprinkle a little normal sugar with cinnamon over the apples

Put in the pre-heated oven for 35 minutes

Let it cool down for 5 minutes, then remove spring

Ready to eat after another 40-50 minutes of cooling down

If you can manage to keep it longer than a day, put in fridge