Bring the milk, sugar and vanilla pulp to the boil. Mix cornstarch, orange peel,
Stir orange juice, egg yolks until smooth, add to milk, stirring until well blended. Pour into a large enough bowl, season with liqueur. Cool to room temperature, stirring occasionally.
Grate the marzipan. Beat with egg yolks, two tablespoons hot water and 50 g sugar with the whisks of a mixer for five minutes until very creamy. Whip egg whites and a little salt with clean whisks until stiff, adding 100 g sugar. Continue beating for two minutes until you have a creamy, firm snow. Fold into the marzipan mixture. Sift flour, cornstarch and baking powder on top, fold in with brittle.
3. spread the mixture into a 24 x 24 cm square cake springform pan lined with parchment paper on the bottom, or a 26 cm dia. round pan.
Bake in a heated oven at 180 °C on the 2nd rack from the bottom for 25-27 minutes (gas 2-3, convection oven 160 °C). Cool in the pan on a rack. 4.
Remove the base from the pan, cut twice horizontally and divide into 3 layers. Place the bottom cake layer in the cake springform pan.
Mix orange juice and :liqueur. Drizzle the 3 layers with the mixture. Beat room-warm butter with the whisks of a mixer for 5 minutes until very creamy.
Gradually fold in room-warm pudding on slow speed.
5. Spread one-third of the cream on the bottom cake layer, top with 2nd cake layer, spread with half of the cream, top with 3rd cake layer, and b