Fat Daddio cake pans :(
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I have those pans as well and I use them the same as I do the regular rounds and squares.
I only flower nail the 12 inch.
I am thinking they may be over filled.
When I use my mad hatters I fill to about 2/3 of the shallow side and I use my bake even strips on them.
I also use my regular cake recipes, I never use then with a carrot cake or anything very dense.
I worry they will have trouble cooking thoroughly.
I hope this helps