Cream and egg yolks both help prevent large crystals of ice and render ice-cream makers unnecessary.

Yes, Edey's is a large ice cream brand that is very popular.

Yes, "If you were a scoop of ice cream" is a metaphor because it is comparing someone to a scoop of ice cream in a figurative way to convey an idea or image.

The ice crystals in the ice cream form very rapidly due to the intense cooling effect of the liquid nitrogen. They do not have time to grow large. The "grit" you taste in cheap ice cream is made of large ice crystals. small crystals = no grit

You are about 1 year in a half to eat a ice cream