Jess, my thermometer seems to be working fine, the first thing I did after tasting the first (crumbly) cake was to test it in boiling water. I have to be honest, I’m a bit stumped as to what exactly happened. All I can think of is that my oven was running cool, and the longer cooking time dried out the center, despite the internal temp being correct. Or maybe there was some mistake in ingredients that I was never able to catch? I was very careful and weighed everything, but you never know…
For the second try, I took the cake out at 35” after testing to see if the middle sprang back and using the thermometer, which measured 204F in the center, higher moving away from the center.
Just wanted to add that Silke came up with a good description of texture of this cake, it’s like marzipan on the inside. Only flavored with toasted almond, butter, vanilla and rum (instead of bitter almond).