Gotta calculate square inch. They are using a 12 inch pan so radius square * pie => 6x6x3.1416= 113 sqinch
8inch pan => 4x4x3.1416=50 sqinch you need 44% of the recipe
9inch pan => 4,5x4.5x3.1416=64 sqinch you need 56% of the recipe
So those two probably work with 5 eggs either slightly thinner resp thicker then in the recipe. Baking time slightly shorter I couldn’t tell you how much.
It's actually simpler than that; you don't need the actual area since you're just looking for a proportion. You can simply square the diameter (or the radius, whichever number is easier to work with), halve it and the square root of that will be the number you want. Or, for a half recipe, you can simply divide the diameter by the square root of 2 (about 1.414)
/0461bffa-e033-4174-995e-8818ea61c62b--2018-1218_river-cafe-chocolate-nemesis-cake_macro_3x2_ty-mecham_001.jpg)
2 Comments
8inch pan => 4x4x3.1416=50 sqinch you need 44% of the recipe
9inch pan => 4,5x4.5x3.1416=64 sqinch you need 56% of the recipe
So those two probably work with 5 eggs either slightly thinner resp thicker then in the recipe. Baking time slightly shorter I couldn’t tell you how much.