A few years back I used to play with a player who always accepted the queens gambit pawn and used to hold on to it and sometimes win with the pawn plus. Is there any specific variation that can be studied in favour of black in queens gambit accepted?

A few years back I used to play with a player who always accepted the queens gambit pawn and used to hold on to it and sometimes win with the pawn plus. Is there any specific variation that can be studied in favour of black in queen's gambit accepted?