[1] His first experiences with the preparation of butter and cheese was in his mother's kitchen, where she would keep a brass kettle over the fire on Djursland in the mid-1800s.
[4] Tholstrup married Sørine Larsen (1871–1946), with whom he had eight children, Henrik (1893), Lili (1894), Laurits (1896), Poul (1898), Hans (1901), Erik (1902), Knud (1904), and Jacob (1906).
[5] Tholstrup and his wife Sørine were also active in the Christian Science movement, were members of the Retsforbundet and known as political debaters.
[1][3] He then became the manager of various increasingly large dairies, first in Southern Jutland, then in Zealand, where he seriously started with cheese production.
When it later became a cooperative dairy, milk from several herds with different fat content began to be mixed with the continuous centrifuge that had been developed at Maglekilde Maskinfabrik in Roskilde by designer I.C.
[2] This conversion was inspired by the movement "Bedre byggeskik" [da], an association formed in 1915 to beautify buildings in the countryside.
[2] His son Henrik received a recognition award in 1963 for his massive effort in making the Castello blue cheese popular not only in Denmark, but all over the world.