This study investigated the prospective associations among emotion expression, behavioral regulation, and cortisol responses in relation to different maternal parenting behaviors during the first 2 years of the infant's life, among a sample of low-income families. Participants included 1,141 mother-child pairs, assessed when the infants were 6, 15, and 24 months old. Maternal parenting behaviors were observed at the 6-month assessment, whereas infant emotion expression, orienting toward mothers, and cortisol responses were measured using a series of emotion-eliciting tasks at all time points. A latent profile analysis revealed four maternal parenting profiles: Detached, Intrusive, Average, and Engaged. Furthermore, a multiple-group path model revealed distinct patterns of emotion development for infants within different maternal parenting groups. Among children with Engaged and Average mothers, orienting behaviors tended to predict less negative emotion and cortisol responses, which was associated with more future orienting behaviors. Conversely, among children with Intrusive and Detached mothers, orienting behaviors tended to predict more negative emotion and cortisol responses, which predicted less future orienting behaviors. Findings of this study enhance current understanding of how different profiles of maternal parenting behaviors impact infant emotional development in poverty, with significant implications for intervention programs targeting early mother-infant interactions.