I am making a four tier wedding cake. I have the 6", 8", 10" cake pans but no 12". I dont want to go and buy a whole set so I was wondering how would I cut a rectangular cake into a 12" cake? Any ideas on how to get a 12" square cake?

Bake eight 6-inch cakes and arrange four of them them side by side to get the 12x12--then place the rest on top.

But what I would really do is buy the 12. You can purchase a single cake pan.

And if it was me I'd bake the 8's instead of the 6's and trim off all the edges to get it down to 12.

Thank you for the ideas.

Why not try baking in a 12x18 half sheet and cutting it down to 12"?

I'd just go buy a 12" pan. They are around 10 to 12 bucks on Amazon. If you have a Micheals or Hobby Lobby by you, you can find one there as well. My local Walmart has them also.

Seems like a lot of extra headache to make additional cake and cut it or making a ton of little cakes to add up. But this would make sense I guess if you don't ever plan on doing another 12" cake ever again.

I would definitely get the 12" pan from Michaels, Hobby Lobby, JoAnns, or Walmart. They are not expensive (especially with the 40% coupon), and would save a lot of time and effort.