this website has the recipe. It is the website from the cafe/ pastry shop in Wadowice, actually.
.cafe-galicja.com/cream-cakes.html
and here's a website with metric cooking conversions:
.transonline.no/conversion.htm#cooking
good luck & God Bless
(b/c of spamming issues they made me remove the 'www' so you'll have to add them back in for the links to work.