For over 60 years, the United States has provided assistance to food-insecure countries primarily in the form of food commodities procured in the United States and transported overseas. In recent years, the United States has joined other major donors in increasingly providing food assistance in the form of cash or vouchers. In fiscal year 2014, U.S.-funded cash and voucher projects in 28 countries totaled about $410 million, the majority of which was for the Syria crisis, making the United States the largest single donor of cash-based food assistance. GAO was asked to review USAID's use of cash-based food assistance. In this report, GAO (1) reviews USAID's processes for awarding and modifying cash-based food assistance projects and (2) assesses the extent to which USAID and its implementing partners have implemented financial controls to help ensure appropriate oversight of such projects. GAO analyzed program data and documents for selected projects in Jordan, Kenya, Niger, and Somalia; interviewed relevant officials; and conducted fieldwork in Jordan, Kenya, and Niger. GAO is making recommendations to strengthen USAID's guidance for staff on approving award modifications and its guidance for partners on responding to changing market conditions. GAO is also making recommendations to strengthen financial oversight of cash-based food assistance projects by addressing gaps in USAID's guidance on risk assessments and mitigation plans and on financial control activities. USAID concurred with the recommendations.