No buttermilk mentioned in the list of ingredients, only in the preamble and the instructions.

Hi Valerie, thanks for the catch! Hopefully the community member who posted this recipe can hop in with the missing measurement. In the meantime, here are a few more bread pudding recipes that you could try out:

https://food52.com/recipes/71617-julia-turshen-s-angel-food-bread-pudding-with-butterscotch-sauce
https://food52.com/recipes/32526-persimmon-walnut-bread-pudding
https://food52.com/recipes/33952-challah-bread-pudding-with-raspberries
https://food52.com/recipes/80513-simplest-bread-pudding-with-salted-brown-sugar-sauce