It’s October, and in October, all sorts of clever, colorful Halloween-themed treats abound. These were entirely a mistake – made because I discovered that if I blitzed up freeze dried berries, I got something akin to berry powder that could easily be subbed in for a bit of flour and which lends brilliant color to anything oven-bound. The chocolate caps on these tiny raspberry drops just happen to look a bit like the Harry Potter sorting hat or other seasonal costumes, so I’m dubbing them a fine entry into the spooky sweets category. They’re a bit of an oddball: deep dark chocolate ganache (or something akin to ganache) with a…