Caramel.

Cutty thought hard about what he had on him at the moment. He did make it a habit of carrying small samplers of sweets on his person somewhere, just in case he ran into any potential buyers in some corridor or another. Cutty unfastened the closure of his bag and rummaged until he produced a long rectangular wooden box from his bag 'o tricks. He gave a shifty glance around the room to make sure all of the students were heavily engrossed in their work before lifting the latch and exposing the compartmental sectors of candy within.

Chews, Nuts, Jellies, Brittles, Helva! He might just eat that one later! and Caramels! He dug is grubby finger in and pulled out one of the moist caramels from it's little cubicle home and placed it onto the surface of his desk. He put away the box and then set to thinking of ways to dry out the soft treat. If it was going into a loose leaf blend then it must distribute evenly. Cutty took up his wand again and set to trimming the little caramel into even bits. "Flipnsnipwitit!" He was getting quite good at the charm Tobias had taught him and when he was all through, the goopy little bits were sitting in front of him ready for their drying.

"Siccus Aerous!" He once again performed the semi-complex wand movement and testing one of the bits, he picked it up and let it fall a short distance with a tapping sound that told him of it's dried state. Into the basket it went with rest of his dried ingredients. All that remained was a small bit of salt, which he'd have to nip from the kitchens or perhaps purge from one of his precious brittles.