Three female foster care youth, aged 15, 17, and 17, volunteered to participate in customized counseling interventions. A theory-based presentation framework was used to conduct an A-B-A single-case research design. A female licensed professional counselor collaborated with the participants in customizing interventions, delivering the intervention, and collecting the outcome data, with the three participants engaging in self-monitoring to provide outcome data. Four career and college readiness self-efficacy factor scores were used to determine the components of the customized interventions and to assess the participants' progress. The factors were: (a) college knowledge, (b) positive personal characteristics, (c) academic competence, and (d) potential to set and achieve future goals. Positive trends occurred for each participant, although different factor-specific outcome data patterns occurred for each participant. Effect sizes ranged from small to large across the participants and factors, and the participants found value in their respective customized interventions.