When I was visiting Boston, I had a list of desserts I knew I had to taste.  Luckily, I was not disappointed by anything I tried and picked out my five favourite sweet treats that I recommend. 1. Salty Toffee Donut at Blackbird Donuts (492 Tremont St.) I made an extra long detour just to make sure I stopped by Blackbird Donuts and it was totally worth it.  Although I...