Introduction: Breast engorgement occurs in 72 to 85% of postnatal mothers. One home remedy, i.e., cabbage leaves application, is very effective for engorgement. The objective of the study was to assess the effectiveness of cabbage leaves application on breast engorgement among postnatal mothers. Materials and methods: The study was conducted in tertiary care medical institute and one private hospital in Amritsar. Totally, 63 (33 in study and 30 in control group) postnatal mothers with engorgement of breast were selected by purposive sampling technique and quasi-experimental design was adopted. Storr breast engorgement scale was used to assess the breast engorgement. The chilled cabbage leaves were applied on engorged breast twice a day for 3 subsequent days. The obtained data were analyzed by using descriptive and inferential statistics like frequency, percentage mean, standard deviation, unpaired t-test, and Chi-squared test. Results: The study result showed that there was reduction in breast engorgement level after the intervention and also showed statistically highly significant difference in between the groups. Conclusion: There was a significant reduction in severity of breast engorgement among postnatal mothers after application of chilled cabbage leaves. Thus, it was proved to be an effective intervention for severity of breast engorgement. Therefore, this intervention should be promoted as an institutional policy and implemented as a routine care for all postnatal mothers having breast engorgement for reducing severity of breast engorgement.