This makes a fair amount so have the pop makers ready and drink whats left over:P
1 tray of ice
vanilla extract or vanilla syrup
instant coffee (how much depends on how strong you like them)
dump the ice in the blender
cover with milk but leave about 1 inch of ice above without it floating
put in about 1/4 cup sugar
add about 3-4 tbsp instant coffee
add 1 tbsp vanilla extract or syrup
blend the absolute hell out of it till smooth.
spoon the drink mix into the pop maker, put the tops on and freeze for several hours.
Enjoy the leftovers now