The aim of the present study is to determine the efficiency of high Protein biscuit (HPB) in the treatment of under-fives with moderate Undernutrition (-2SD), through its optimal use and health education for mothers. To achieve the above aim a randomized controlled trial study design was adopted, and Al-Sharki Primary Health Care Centre (PHCC) and its community child care units (CCCUS) were chosen as a study setting. Fifty undernourished children under-fives (-2SD) were chosen group (A) as a case and another 50 also undernourished (-2SD) were chosen as a control group (B). A program of supervised feeding of children in group (A) was designed and implemented. The control group (group B) received the (HPB) from the (CCCUS) according to the regulation of the Ministry of Health. The study took a period of six months (31/12/2000 - 30/6/2001). Evaluation was done at the end of June 2001. A significant decrease the incidence of acute respiratory infection and acute diarrhea in both study groups were noticed. However, it was higher in group (A) than in group (B). More significant improvement in mother's knowledge about (HPB) was recorded in group (A). Regarding the nutritional status only (10%) of group (A) children their weight for age was not improved compared to (34%) of group (B) children. While by using weight for height only (2%) of group (A) children were not improved. Reduction in the prevalence of anemia was also more in group (A) than in group (B).