Mix the baking powder with flour and knead with butter, sugar and cream to make a shortcrust pastry. Divide the dough into 3 equal pieces.
Roll out the pieces of dough thinly on a well-floured board, put a 24-inch springform pan on top and cut off the remnants of the dough all around. Cut each dough circle into 8 pie pieces. Place either 1 teaspoon of Nutella or 1 teaspoon of apricot jam on the outside of each piece and roll up the pieces from the broad side towards the tip. Place with the seam down on a baking sheet lined with baking paper. Combine the leftover dough and make croissants out of it.
Bake in a preheated oven at 160 ° for 12-15 minutes.
Mix the icing sugar and thin hot apricot jam into a glaze that is not too thin and coat the croissants with it. Lightly sprinkle with chocolate icing.