Here's a link to the recipe I mentioned in the post about blackberries...it's excellent and super easy. I used blackberries; some were so large I cut them in half. Only mistake I made was that I pushed the berries down into the batter rather than just leaving them on top (as the recipe says to do!). They ended up at the bottom of the cake and some stuck to the pan. But not to fear...the cake was delicious and we ate every crumb.
I follow this blog, Smitten Kitchen, and her recipes are fabulous.