Twilight is a great little tea shop with a good array of vegan baked goods. I had a cowgirl cookie ($2.50) and a small pot of Darjeeling tea ($4 or so). The service was really friendly and knowledgeable, which is great given the wide array of teas to choose from.
The cookie was great and comes from Cafe Evolution in nearby Northampton, MA. They also offered a couple cupcakes, a brownie and a few other tasty-looking desserts.
I only have two gripes: 1) There's not enough seating. There's basically one loveseat, two chairs with a side table and then another small table. As such, you might have trouble finding a spot to sit down. 2) It's cash-only.
Other than that, Twilight is a great little place and I look forward to returning when I'm in Brattleboro!