I confess that I've never actually had a Frappuccino at Starbucks because when I enquired about it the staff told me it's made with a dairy base. I'll have to ask again, though, because Starbucks have a thing going on their website where you can "create your own" and soya milk is one of the options available.
Loving my coffee and wondering what I might be missing out on, I decided to look for a mock frappuccino recipe which I then veganised. It's dead simple, providing you have a decent blender or Smoothie 2 Go (ie a machine that will blend ice without blowing up). I found the resulting drink, written as it was in the original recipe, to still be rather bitter so I upped the sugar by 1/2 tbs. When I make this again I might just put normal-strength espresso in it rather than the double-strength called for in the recipe as that way I might not need the increased sugar. I love that you get lots of froth!
Starbucks' Frappuccino (sort of...)
90ml (1/4 + 1/8 cup) double-strength *cold* coffee (make a double-shot espresso)125ml (1/2 cup) soya milk
2 tbs caster sugar
1 cup ice cubes (250ml cup)
Just whizz everything up in a blender capable of crunching ice and serve.
Makes: 1 big serving