Krakatoa

I found this recipe here, but I found his explanation a bit too complicated so I adapted a bit.

Right, first you bake a sponge cake (your favourite recipe). I used this one.

Right, next, i softened a tub of ice cream a bit (15 sec on max in the microwave). I'm making a smaller cake here, but i was enought for 6-8 portions.

Cut the edges of the sponge cake, making a circle (the size you want your krakatoa base). Make a small amount of sugar syrup by boiling about 1/4 cup (60 ml) water with 2 tablespoons sugar until the sugar is dissolved. Let it cool completely, then add a good pour of your favorite liquor. Wet the sponge cake base with the syrup.

Add the ice cream balls (the height you want). I used about 8 balls. Model them roughtly in the shape of a mountain.

Take it all back to the freezer and make the meringue with 6 egg whites and 6 to 8 tbspoons of sugar. Save half of one egg shell for later.

Remove the cake from the freezer and spread the meringue all over the top and sides. Bury a half an egg shell in the top, open side facing outwards and smooth the meringue up and around it. Put it back on the freezer until it's time to serve.

Brown the volcano in an pre-heated oven at very high temperature (260 C, gas mark 9). It shouldn't take more than a minute or two to 'cook'. You can finisht it with a blowtorch since it looks more dramatic with slightly-burnt edges.

Fill the egg shell with liquor that's at least 40% alcohol. Turn off the lights, and ignite the liquor. Cut the cake with a narrow, long knife dipped in very hot water