what's 奶酥 in english? A lot of translations suggest it's "butter biscuit, but that's not the correct thing I'm thinking about.

I'm referring to the filling in bread sold from bakeries that is flaky and sweet, sometimes with raisins in it.

does anyone know what the most accurate translation is?
To my best knowledge it's Chinese puff (pastry) or Sou (transliteration of 酥). These words are not super accurate translation though.