Make a puff paste, and roll it out. Spread raspberry jam, and make it into dumplings. Boil them an hour, pour melted butter into a dish, and strew grated sugar over it.
... to a smaller extent by the slipping friction.
The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent ...