Background: The transition from teacher-centred towards student-centred approaches in English language teaching, accompanied by developments in educational technology, has attracted researchers' attention to reverse teaching or flipped class. The related literature asserts that this mode of instruction might influence instructors' and students' participation in the class. Objectives: To shed more light on the role of flipped class in affecting language learning strategies and skills, this study applied a sequential explanatory mixed-methods approach to explore the impact of flipped class on English as a foreign language (EFL) learners' writing metacognitive strategies and writing skills. Methods: Forty-six intermediate EFL learners with an age range of 21-27, studying at a private language institute, were randomly divided into two groups of 23 learners. The two groups were randomly assigned to a flipped class, which received writing metacognitive strategies and writing skills through video clips before the class time, and a non-flipped class, which received writing metacognitive strategies and writing skills in a conventional way during the class time. Results and Conclusions: The results revealed that both flipped and non-flipped classes improved the EFL learners' writing metacognitive strategies, writing performance, writing content, and writing organisation. Furthermore, one-way ANCOVA analyses indicated that the flipped class outperformed the non-flipped class in writing metacognitive strategies, writing performance, writing content, and writing organisation. Thematic analyses, which were used to help analyse individual semi-structured interviews, uncovered a number of categories and themes, signifying the flipped learners' positive perceptions towards the flipped class, such as enhancing motivation, self-confidence, and writing collaboration. Implications Pedagogical implications were discussed for flipping writing metacognitive strategies and writing skills.