Small Circle Cake Pan. 9x9 = 81 square inches. Two 8 x 8 x 2 or 9 x 9 x 2 inch baking pans:
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This will be in the middle for support. Bake cool (340f) to minimize the center lift and keep the cake flat. Half sheet (aka 18x13) = 234 square.
(77 / 117 = 65%).
There’s minimal risk of sticking, too, since each pan. 4.2 out of 5 stars with 92 ratings. Tall bread / panettone baking ring. Bake cool (340f) to minimize the center lift and keep the cake flat.