Made an angle food cake. Now I have a dozen egg yolks to use up. Any suggestions?

There's a Dutch "drink" called advocaat. (Homonym with the word for "lawyers", make of that what you will.) Thickened by heating gently, with a somewhat serious amount of brandy and (going on memory) some sugar. I don't have a favorite recipe handy, alas.

I went for this, flan patisserie.

I made a baked custard using 3 yolks and 2 eggs Or, chocolate mousse uses yolks Scrambled eggs with some yolks and an egg or two

Lots of lemon curd 😋https://www.chelsea.co.nz/browse-recipes/lemon-curd/

Custard. Mayonnaise. Was your cake square?