Yes I make the Caramel Frappaccino at home and it tastes EXACTLY like theirs!!
I haven't made it in a while though but here is how I did it as close to it as I can remember..
Fill Blender 3/4 with ice.
Add bout a 4th of the blender of milk < I used skim but any kind ya want.
half container of cool whip.
squirt in some caramel much as ya like but not too much cuz it will go on the top too lol.
add some scoops of instant coffee it still gives the same taste as coffee but doesnt melt your ice. Add it according to how strong ya want it.
blend it all up add more cool whip milk or coffee (if its not strong enough) or ice to liking if it needs it. Remember ya don't want it too watery so watch the milk.
Then pour some in a cup put some coolwhip on top and squirt some caramel over it and walaaah it is exact pretty much and sooo yummy!!
Hope yall like it.
O yeah usually makes about 2 - 2 1/2 big starbucks glasses full I keep my cups to put my homemade stuff in and take some extra straws from starbucks when ur there lol