I am doing a 4 tier 50th Anniversary cake for my Grandparents. We will have way more cake than we'll need. I thought about a fake cake for the bottom layer but decided rice Krispy treats would be cool, especially for the kids. I am also not very experinced with cakes, capable but not experinced, so I was thinking that If I compact the treats really well they would work as a really sturdy base layer 
. Does anyone have any ideas, thoughts, suggestions? How do I get the treats very compact? Will it be more sturdy than cake (I'll still use dowels)Will it support the other 3 tiers better? Any particular recipe I need to follow
Thanks in advance for any help
I did the bottom tier of this cake in rice krispy treats.
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1447570
It won't be more or less sturdy than using cake, and it won't support more because it doesn't actually support the cakes on top of it, your support system does (dowels/plates)
If you're planning on eating it then i wouldn't compact it. I just make my normal recipe and put them in the pan for about 10-15 mins. Pop them out to finish cooling on the counter and form my next layer. If you do want to companct the treats then i would crush the cereal a little bit before adding it to the marshmallow mixture.
I left my rkt in the pan overnight - just tired more than any "real" reason. I made 2 double batches (4 total) for a 16 inch pan. I just kept pushing and pushing, used the rolling pin to level it. I only did the 2 inch bottom layer. I did use the dowel supports. I think is is not what cake/ rkt/ cookie recipie that you use, it is all in the support system. SPS is my favorite.
I agree, I wouldn't compact it down too much otherwise it would be too hard. A good support system will support the tiers on top of the treats.
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