It could be a misspelling of:
* "Creme de menthe," a sweet green-colored liqueur flavored with mint.
* "Cremeschnitte," a rich, creamy Austrian pastry made with puff pastry, custard, and whipped cream.
* "Crème brûlée," a dessert made with custard topped with a layer of hardened sugar.
Without more context, it's impossible to say for sure what "cremedusche" is supposed to mean.