I need the recipe? One person thought it must be a dump cake but that doesn't sound like what my friend who cooked it could be. But if you think it's a dump cake I'm thinking of, by all means, give me the recipe. I'll give it a try and we'll find out! thank you!
I forgot to describe the cake. It's cobbler-esque. I THINK she said she just put the frozen blackberries into a baking pan and then poured yellow cake mix over them. She put pats of butter on top.

At least that's what I think she said. I just want to confirm the details before making it myself, without having to admit to her that I already forgot it. I don't see her much anyway.