A new and distinct cultivar of Primula plant named `Kerbelmilk,` characterized by its upright, compact, and uniform plant habit; large, double, nonfragrant and cream-colored flowers that are held upright on strong and erect peduncles; early flowering in natural season; fast production suitable for 9 cm to 12 cm pots; an enlarged calyx which forms a green collar around the flower; and tolerance to low temperatures.