International twinning programs have been well-established between institutions in childhood cancer and have led to pediatric cancer units in low- and middle-income countries (LMICs) adopting multidisciplinary forms of care. To advance nutritional care in LMICs, the International Initiative for Pediatrics and Nutrition (IIPAN) provided the structural framework and personnel for the delivery of nutritional care. We describe the impact of a newly established nutrition program on the delivery of nutritional care and nutrition-related clinical outcomes in children and adolescents undergoing treatment for cancer in Nicaragua and Honduras. A prospective cohort (N = 126) collected clinical data over a 2-year period. Collection of IIPAN's nutritional services received during treatment and clinical data were abstracted from medical charts and registered in Research Electronic Data Capture (REDCap) database. Chi-square, ANOVA, and generalized linear mixed models were used; P < .05 was considered statistically significant. Nutritional assessments led to a higher number of patients receiving recommended standard of care. Children classified as underweight during treatment presented higher number of infections and toxicities, length of hospital stay, and days of treatment delays during treatment. Overall, from the start to end of treatment, 32.5% of patients improved nutritional status, 35.7% maintained it, and 17.5% worsened. On the basis of metrics, the cost per consultation was less than 4.80 US dollars (USD; Honduras) and 1.60 USD (Nicaragua). Integration and equitable access of the nutritional care process for all patients needs to be recognized as a component of the basic management in pediatric oncology care. IIPAN's nutritional program demonstrates that nutritional care is economical and feasible in a limited resource setting.