Martian Snow Cone

The photo of water ice in a Martian crater makes me think of a lucious summer dessert at an expensive restaurant:
This image, and others, can be viewed at the ESA’s Mars Express website:

The HRSC [High Resolution Stereo Camera] obtained these images during orbit 1343 with a ground resolution of approximately 15 metres per pixel. The unnamed impact crater is located on Vastitas Borealis, a broad plain that covers much of Mars's far northern latitudes, at approximately 70.5° North and 103° East.
The crater is 35 kilometres wide and has a maximum depth of approximately 2 kilometres beneath the crater rim. The circular patch of bright material located at the centre of the crater is residual water ice.
This white patch is present all year round, as the temperature and pressure conditions do not favour the sublimation of water ice.
It cannot be frozen carbon dioxide since carbon dioxide ice had already disappeared from the north polar cap at the time the image was taken (late summer in the Martian northern hemisphere).

Image credit: ESA/DLR/FU Berlin (G. Neukum)