Hi everyone,
I haven't been here in a long while and when I came across this problem I knew exactly where to go! Hope someone can help.
I have to make a plated dessert, creme brulee cooked on top of a cake. Every recipe I try, the brulee mix soaks into the cake. I've tried a number of different recipes to no avail. Searching the internet resulted in some great pics, but nothing more.
Anyone have experience with this or a recipe I can use? The only stipulation is that the cake has to be vanilla.
Thank you!! 
You say you have to make the plated dessert with the creme brulee cooked on top of the cake. I'm curious as to where you got that request and are there any more instruction/stipulations?
Because most custard-type things, like a creme brulee, need to be cooked in a bain marie (I think), which I guess might be do-able on top of a cake (I'm not a baker or a pastry chef by any means), but that doesn't sound feasible to me.
On the other hand, I make several recipes with a custard (creme brulee, flan, etc.) that comes out on top of the cake. But you make your cake batter, pour it into your pan, pour in the custard, it sinks to the bottom just as you say, you bake it with the bottom part of the pan, and therefore the custard, in a bain marie.
Then, when it's done, you take it out of the oven and invert it, so that the custard is now on top.
Then you can add some sugar and caramelize or whatever.
This is usually done in a bundt pan or angel-food cake pan in my experience, but I've done it in a regular cake pan as well. The main problem if you bake it in a regular cake pan is that when you invert the cake, the top of the cake might have risen so that the cake won't rest flat when it's upside down on the plate. So you have to trim it off to make it level before you invert. As I said, I'm not a pasty chef and don't know all of the ins and outs of cake baking, so there might be a way to make that cake bake flat on top so you don't have to trim, but I don't know what it is. It's not a problem in a bundt pan, but with a regular cake pan, it is.
And for my chocolate & vanilla flan cake, I always pour a jar of cajeta into the bundt pan before the cake mix. So when I unmold the whole thing, the dark chocolate cake winds up on the bottom, and the creamy white vanilla custard winds up on top with the caramelly cajeta dripping down. Not only delicious, but visually stunning.
Like I said, not sure what other instructions you have, but I can't help but suspect you need to bake the custard on the bottom of the cake in a bain marie, and then invert it in some manner. I just don't see how it's possible to do it otherwise.
And in so far as the "right cake" to use - I've made it with all sorts of cakes, including box mixes, etc. I don't think there's any specific cake mix recipe that works vs one that won't work. I think any regular basic cake recipe works fine.
As I said, I'm not a baker or a pastry chef and, in fact, that's my weakest area of expertise, so this might not be helpful at all but, since you threw it out there for anyone to answer, that's my two cents.
Edited by Jaymes, 09 March 2012 - 11:33 AM.