Background: Training in professional psychology is moving beyond knowledge-based education and toward competency-based education. Similarly, experiential learning, focused more on skills than facts, is emphasized in undergraduate education. Few studies, however, have investigated the use of skill-based learning for clinically relevant skills in undergraduate psychology courses. Objective: This study investigated deliberate practice as a skill-based method for training undergraduates to use basic Motivational Interviewing and reflective listening skills. Method: In an upper-level undergraduate clinical psychology course, students were randomly assigned to an MI workshop that included deliberate practice to learn basic reflective listening skills or a waitlist control group. Results: In both between (workshop versus waitlist) and within (pre versus post) group comparisons, students' ability to use reflective listening improved as evaluated by raters, blind to condition, and in self-report measures of MI knowledge and skill. Conclusion: Deliberate practice may be effectively incorporated into undergraduate courses to prepare novice helpers with basic listening skills. Teaching Implications: Competency-based training in listening skills may help undergraduate students prepare for graduate school in the helping professions or any of multiple post-graduation professions not requiring professional training and licensure.