The 21-year-old forward, who has represented Denmark at under-21 level, will link up with the Black Sheep who compete in Eerste Divisie, Netherland's second tier of league football, for the duration of the 2020/21 season.
The Danish youngster made his senior debut for the Magpies in their 2019/20 Premier League Asia Trophy campaign in China and scored 20 goals in all competitions for Newcastle's under-23 side a further season ago.
Sørensen was named on the bench for two of United's FA Cup fixtures last term, a 1-1 draw at Rochdale in the third round followed by a stalemate against Oxford United at St. James' Park.