I want to make a cake in the shape of a house, and I want nice a sharp, straight roof line. I thought rice krispie treats would be perfect since they are lightweight. I also want it to taste really good. I remember eating peanut butter rice krispie treats with a chocolate topping as a kid. The closest recipe I can find is for Scotch-a-roos:

Instead of pouring the chocolate over the treats in the pan, I would ice it onto the roof and put fondant on top.

Does this sound like a good or a bad idea?

Has anyone experimented with this recipe, instead of the classic RKT recipe? How did it work?

I am making PB rice krispies for a friend of mine this week. I make it very simply:

In a large pot over a med-low heat, melt and stir:

1 bag marshmallows
1 stick butter
about 1/2 cup PB (I just kind of dollop in a few tablespoons until it's a PB-y as I want)

When it's all melted, I add most of a 15 oz box of rice krispies, stirring in some at a time until it's the right consistency.

You could definately add some chocolate to that if you wanted.

If you're using it for a roof, I would spread it out on a cookie sheet to firm up, so you have a nice, thin layer. Make sure you use LOTS of cooking spray on the pan, and also on the spoon you use to smooth it - it's really sticky.

A cookie sheet is a good idea to make it really thin. Then I can probably just cut it with a knife to get nice straight edges.

What about a chocolate coating under the fondant? Will that cause any problems?