200 g. Butter
500 g. blackberry jam
500 g. Flour
200 g. sugar
Put the flour and butter in a bowl and mix.
Add the eggs and sugar until the dough is smooth. Let the dough rest in the fridge for an hour. Butter the pan and roll out the dough.
Add the jam. With the advanced dough ... decorate! Bake in the oven at 170 ° c for 50 minutes and...voilà!