Inclusion Criteria:  GDM (OGTT level of blood glucose ≥ 9 mmol/L) Normal blood pressure Age > 18 years  Exclusion Criteria:  Special dietary regimes > 1 month at time of inclusion e.g. ketogenic diet Daily intake of protein supplements Milk allergy or phenylketonuria Medication with effect on glucose metabolism e.g. steroids Do not speak or understand Danish Twin pregnancy PCOS PI finds the patient unfit (like mental illness, too nervous or other) Severe chronic illness Severe nausea/vomiting Non-breakfast eaters Celiac disease  The initiation of insulin treatment during the trial will not lead to exclusion from the trial.