Several months ago, my roommate went on a fruit-preserves making binge, and our apartment ended up with at least five Tupperware containers full of blackberry jam. It's delicious stuff, though our apartment's demand for preserves never quite caught up with its supply, and now we're stuck in surplus-land. I attacked the problem by mixing up some blackberry preserve yogurt, with about two heaping tablespoons of preserves, and I was really pleased. The preserves are already both sweet (so no need to add more sugar) and smooth (so I didn't have any mixing or consistency issues to complain about). It's not the most exotic thing I've ever made, and I'm sure you can find commercial blackberry yogurt plenty of places, but this is the first one I've made that had the taste and feel of something you'd actually pay money on.
Every trip I take to Berkeley Bowl results in at least fifteen dollars' worth of things I never intended to buy making their way into my shopping cart anyway because they look so delicious. One late April's result was a bag of cinnamon sugar almonds; once the bag was nearly depleted, the rest got ground up in the mortar and pestle to produce about a quarter cup of ground nuts, which then became candied almond yogurt. These nuts were delicious, and sweet, anyway, so the resulting yogurt tasted pretty good, but my old enemy texture reared its ugly head again.
The lovely pink color in this batch comes from fresh strawberries, which I chopped up and mixed into the yogurt without adding anything else. I thought the natural sugars from the strawberries would sweeten the yogurt enough, but if I try this again, I'll definitely need to supplement it. The strawberries weren't so finely chopped, but I didn't mind that texture so much because they were already mushy, and it didn't turn crunchy. Aesthetically, this might have been among my more successful yogurts--it looks nice and smells pleasant too.