Star gooseberry (Sauropus androgynous) leaves contain several sterol compounds. Mung beans (Vigna radiata) are known well as protein and vitamin B1 source. Both are effectively affected milk production to increase the baby's weight. This study aims to determine the effect of biscuits made from star gooseberry leaves and mung bean flours on baby weight. This type of research used a quasi-experimental design nonequivalent control group design. The sample was taken by using the purposive sampling technique. The research was conducted at the Managaisaki City Health Center and the Baolan Tolitoli Health Center from November 2020 to January 2021. The samples were breastfeeding mothers who had babies aged 30 days. The intervention group consisted of 28 people who consumed mung bean combined with star gooseberry leaves biscuits, and 27 people as control groups consumed mung bean biscuits only. The biscuit given was about 85 grams/day for 30 days. Data were analyzed using the Mann-Whitney test, Paired t-test, and independent t-test. Generally, respondents in both groups were 20-35 years old. The income tended to be less than the Tolitoli Regency Minimum Wage. All respondents did a light physical activity and were mostly highly educated. Most of the respondents were multiparous and had adequate nutritional intake (> 80% ) RDA 2013. In the intervention group after treatment, there was an increase in baby weight 1078.57 g while the control group was 1003.70 g with p-value <0.05. The difference in the increase in body weight of babies in the two groups was 74.87 g. Thus, giving biscuits of mung bean combined with gooseberry leaves would increase the baby's weight more than biscuit made of mung bean only. It concludes that there was an effect of giving biscuit developed from mung bean and star gooseberry leaves on baby weight.