This research protocol will be embedded as a component of the UN World Food Programme (WFP) -supported Supplementary Feeding programmes in Ethiopia. The proposed study is a prospective cluster-randomized equivalence trial that will compare the relative effectiveness of two feeding interventions in four woredas (districts). Research will be implemented in two comparable woredas (one with CSB and one with RUSF), in two different areas in Sidama zone that represent different livelihood zones, main source of crop income, and level of food insecurity