I also started making coffee frappe's at home too. After I payed 4 bucks for a small one at the coffee shop I figured out how to make my own , (most of the time I dont measure though). Its so easy!!!
I take 2 Tablespoons of Tasters Choice Instant French Roast coffee ( I like mine witha strong coffee flavor & I like this the best ) so u might want to ajust that 2 taste) . Desolve that in a tall glass with a littl hot water .
Then I put ice , 2% milk , & a little sugar in a blender pour in the coffee mixture & blend .
Its so good Ive been making them everyday , SOOOOOOOOOO Yummy

Ps -Sometimes I add a little chocolate syrup and it comes out with a mocha flavor .
