Morality is important for how humans treat each other and non-human animals. Differences in moral reasoning have been found between autistic and neurotypical individuals. Research in this area has relied on accounts of moral psychology that suggest increasingly mature moral principles that develop from taking the perspectives of others. Yet, even autistic individuals, who sometimes differ in their ability to take others' perspectives, make moral judgements that are similar to neurotypical individuals. Moral foundations theory suggests that moral psychology is not hierarchical but differs depending on culture. Moral foundations theory has not yet been investigated among autistic individuals. This qualitative study used interviews and qualitative analysis as a first attempt at understanding how moral foundations theory fits with autistic moral thinking. We found that all five moral foundations of moral foundations theory were represented in the interviews, yet certain foundations appeared more prominent than others. The autistic adults interviewed in our study discussed issues of care and fairness more than of loyalty, authority or purity when prompted to discuss moral transgressions. Future research should use quantitative methods to compare groups of autistic and neurotypical individuals to clarify similarities and differences in moral thinking between the groups.