The pilot intervention consisted of monthly vouchers structured into food group allocations plus nutrition education, tested via a matched pair cluster-randomized trial involving 4,883 repeatedly surveyed households. Vouchers significantly increased food spending, dietary diversity, and food security, though dietary and hunger effect magnitudes were modest. Impacts were stronger for proteins and fruits and vegetables, and in urban areas, smaller households, soon after redemptions, among those with greater nutrition knowledge, and among conditional cash transfer recipients. Corresponding program adjustments could enhance effectiveness.