After blowing off our accustomed gourmet New Year's Eve experience (for very good reason, I might add), the Mr. felt well enough to go to Kat & Andrew's New Year's Day brunch, another two-decades+ fixture in our lives.
I wanted to make something to bring, and the main thing we had in the house besides pantry staples was apples. Several different kinds of apples. I found this recipe on Epicurious, which recommends using at least 4 different types of apples, so I made it. But it was intended for an 8-inch springform pan, and we have only a 10-inch one.
In a moment of rare mathematical thought, I realized that this is a volume problem, and that the shape involved is a (short, squat) cylinder. I found a handy calculator via Google and discovered that the volume ratios were 1 to 1.5. Well! The original recipe calls for 2 eggs, so this was easy-peasy. I did find some additional adjustments needed (our eggs were likely extra large rather than just large, so I needed to add more flour, and I had to extend the baking time, which I did in 10-minute increments, checking the cake for done-ness each cycle), and I also added a bit of cinnamon, because I like cinnamon.
The apples I used were a mixture of Granny Smith, Pink Lady, Gold Rush, and Gala.
( Cut for recipe, with my notes where I made changes )
The cake had competition at the brunch: this was a big year for homemade cakes. Those I could identify include a chocolate swiss cake roll as a buche de Noel, my late mother's sour cream coffee cake (made by my sister, in this case), what appeared to be a pumpkin bread with currants, and our hosts' daughter's blueberry tea cake. We left about 1/3 of our cake when we departed the party, but there was still a group of 10 college- and grad-school-age party-goers playing Cards Against Humanity in the front parlor, so we may never see the remaining cake again!