First of all, I'm not a Starbucks person (I just hate coffee generally) but when I got to know about the Halloween special menu I just tell to myself "I have to get this!" and so I did. For frappes they usually have two options - coffee base or cream base, I just have to simply request the barista to use cream base.
So I ordered that and instantaneously felt so bourgeois (It cost me $8.80 for a drink yo!). At first glance, it doesn't look scary or anything. As for the taste, it's so red bean-ie and has a strong sesame taste. Felt like those potong ice-cream in a form of a shake.
To conclude, it's just a good red bean/black sesame frappe with a lil bit of Halloweenie vibe to it.