Community service learning (CSL) activities in undergraduate programs are associated with improvements in self-efficacy (confidence related to performing a specific task) and academic achievement. This study aimed to understand the impact of a CSL assignment on self-efficacy related to teaching community members about evidence-based nutrition and on the overall learning experience. Students were invited to participate in this mixed-methods study (surveys and focus groups), and the results indicate that the CSL activity not only increased students' self-efficacy related to nutrition science communication, but also gave students a greater feeling of connection to their community and an opportunity to practice skills needed for future careers.