The Magic Breakfast project provided 106 schools with support and resources to offer a free, universal, before-school breakfast club, including to all Year 2 and Year 6 pupils. The aim of the project was to improve attainment outcomes by increasing the number of children who ate a healthy breakfast. The schools in the project were schools in England with a relatively high proportion of disadvantaged pupils. The project ran between September 2014 and July 2015. Schools were provided with free food, support from a Magic Breakfast school change leader, and a £300 grant towards up-front costs. The intervention itself was delivered by school staff and volunteers. The impact of the project was evaluated using a randomised controlled trial involving around 8,600 pupils. The process evaluation involved qualitative research with four case study schools. The project was jointly funded by the Department for Education and the Education Endowment Foundation and delivered by the charity Magic Breakfast. Key conclusions included: (1) Year 2 children in breakfast club schools experienced around two months' additional progress compared to Year 2 children in the other schools in the trial; (2) For Year 6 children in breakfast club schools, results for the main outcomes, reading and maths, were positive but could have occurred by chance. However, on other measures of writing and English they experienced around two months' progress compared to the other Year 6 children. These positive results would be unlikely to occur by chance; (3) The findings suggest that it is not just eating breakfast that delivers improvements, but attending a breakfast club; (4) Pupil behaviour, as measured by a teacher survey, improved in breakfast club schools; and (5) Activities thought to increase take-up of the breakfast provision included promoting it to parents and encouraging all children to attend while sensitively targeting pupils most likely to benefit.