Tufts University, Washington University in St. Louis, School of Medicine, Sierra Leone Ministry of Health and Sanitation (MoSH), Project Peanut Butter, Caritas Bo, World Food Programme (WFP), and the United States Agency for International Development (USAID) are collaborating to conduct an assessment of the effectiveness, cost, and cost-effectiveness of food aid commodities in treating moderate acute malnutrition (MAM) in young children. The study comparison is based on a targeted food delivery to children 6-59 months who are screened for MAM. Study participants will receive one of four approximately isoenergetic test foods: