Background: Women are likely to suffer from maternal depression due to childbirth difficulties and parenting responsibilities, leading to long-term negative consequences on their children and families. British mothers of African/Caribbean origin uptake of mental healthcare is low due to the lack of access to culturally appropriate care. Methods: A mixed-methods randomized controlled feasibility trial was adopted to test the appropriateness and acceptability of Learning Through Play plus Culturally adapted Cognitive Behaviour Therapy (LTP+CaCBT) for treating maternal depression compared with Psychoeducation (PE). Mothers (N = 26) aged 20-55 were screened for depression using the Patient Health Questionnaire (PHQ-9). Those who scored >5 on PHQ-9 were further interviewed using the Revised Clinical Interview Schedule to confirm the diagnosis and randomized into LTP+CaCBT (n = 13) or PE (n = 13) groups. Assessments were taken at baseline, end of the intervention at 3-and 6-months post-randomization. N = 2 focus groups (LTP+CaCBT, n = 12; PE, n = 7) and N = 8 individual interviews were conducted (LTP+CaCBT, n = 4; PE, n = 4).Results: The LTP+CaCBT group showed higher acceptability, feasibility and satisfaction levels than the PE group. Participants experienced the intervention as beneficial to their parenting skills with reduced depression and anxiety in the LTP+CaCBT compared to the PE group.Conclusions: This is the first feasibility trial of an integrated online parenting intervention for British African and Caribbean mothers. The results indicated that culturally adapted LTP+CaCBT is acceptable and feasible. There is a need to study the clinical and cost-effectiveness of LTP+CaCBT in an appropriately powered randomized control trial and include the child's outcomes.Trial registration. www.ClinicalTrials.gov (no. NCT04820920).