Parenting young children poses numerous emotion regulation challenges, and prevention programs that promote emotion regulation skills can help with this important task of parenthood. Relational savoring (RS), which entails savoring a positive experience of interpersonal connectedness, is a brief manualized intervention program, 4 weeks in length, grounded in positive psychology and attachment theory. In the current longitudinal, randomized, controlled trial, we examined the impacts of RS compared with an active control (personal savoring [PS], defined as savoring a positive individual experience) in a sample of N = 164 mothers of toddlers (M age = 20.93 months) on outcomes that were assessed immediately postintervention (positive emotion, closeness to child) and at a 3-month follow-up visit (parenting sensitivity, reflective functioning [RF], savoring uptake, and parenting wellness). Compared with mothers assigned to the PS condition, mothers in the RS condition had greater immediate response to the intervention (greater increases in positive emotions [gratitude, pride], closeness to their child) as well as greater increase in sensitivity to toddlers' cues at the three-month follow-up. Neither RS nor PS increased overall parenting wellness at the three-month follow-up. Latina mothers (but not non-Latina mothers) in the RS condition had higher RF and greater savoring uptake than Latina mothers in the PS condition at follow-up. Findings provide preliminary evidence of the efficacy of RS in modifying therapeutic targets and suggest evidence of the cultural congruence of RS for Latina mothers.