Aharon Pfeuffer (Hebrew: אהרן פפויפר, also "Pfoifer"; 1949–1993)[1][2][3] was a Rabbi, Rosh Yeshiva and Posek, and a recognized authority on Kashrut.
He later studied in chavruta with Shmuel Rozovsky, famed Rosh Yeshiva (dean) of Ponevezh, and came to consider him his primary Rabbi.
[1] Rabbi Pfeuffer is best known for his series on Kashrut, with volumes titled, e.g., "Kitzur Shulchan Aruch al Hilchos Basar be-Chalav" ("Summarized laws of Milk and Meat").
These explicate the Halacha (law) for the major Rabbinic topics here (with one on Niddah also [7]) and are often recommended as a resource for students preparing for Semicha.
[10] These include "Zichron Menachem" and "Ohr Aharon" comprising, largely, "shiurim and chidushim"[11] on various Talmudic tractates, the latter written during his years as Rosh Yeshiva.