The goal of this clinical trial is to test the use of milk fat globule membrane (MFGM) in ready-to-use therapeutic food (RUTF) in children with severe acute malnutrition in Sierra Leone. The main questions it aims to answer are: * Will the inclusion of MFGM in RUTF for 6-59-month-old Sierra Leonean children with severe acute malnutrition improve their neurodevelopment? * Will the inclusion of MFGM in RUTF for 6-59-month-old Sierra Leonean children with severe acute malnutrition reduce its worst consequences: death, hospitalization, and remaining severely malnourished despite treatment? Researchers will compare the MFGM-containing RUTF to standard RUTF, which contains skim milk powder. Participants will: * undergo measurement of length, weight, mid-upper arm circumference, and nutritional edema assessment every two weeks during severe malnutrition treatment * be treated with either MFGM-RUTF or standard RUTF at a dose of 2 sachets per day for up to 12 weeks * undergo neurodevelopmental testing using the Malawi Developmental Assessment Tool at the end of SAM treatment and 6 months later * a subset of participants will undergo blood spot collection and stool sample collection