Danube Waves

First, prepare the base for the cream. Cook the pudding by mixing the pudding powder, sugar, and about a third of the milk in one bowl. Bring the remaining milk to a boil in a saucepan, then pour in the prepared pudding mixture and cook for a few minutes after reaching a boil, stirring constantly.

Transfer to a clean bowl, cover with cling film touching the surface, and let cool to room temperature (I recommend first placing it in the fridge for quick cooling and then taking it out in time).

After baking the cake base and letting it cool, finish the cream by whipping the butter and gradually whipping in the prepared pudding base.