The present study examined the overall potential that the COVID-19 pandemic and its restrictions have for the promotion of climate-friendly food consumption in Germany. We looked at COVID-19-related changes in people’s climate-friendly food-consumption behaviors by comparing retrospectively self-reported performances between the time period in which the COVID-19 restrictions were in place and the pre-COVID-19 period. Furthermore, we examined the durability of such COVID-19-related changes with regard to an imagined post-COVID-19 period and the role of people’s personal climate-protection norms in COVID-19-related behavioral changes. To do so, we conducted two online surveys in June/July 2020 with German consumers: (a) an online study in a sample that was representative of the German population (NCOR1 = 3092) and (b) another online study in a smaller sample of German consumers (NCOR2 = 300). Altogether, the data from both surveys indicated several COVID-19-related changes toward more climate-friendly food consumption, not only during the COVID-19 pandemic and its restrictions, but also with regard to long-term changes in a potential post-COVID-19 period. Furthermore, our results also provide initial empirical evidence that people’s personal climate-protection norms are relevant moderating factors of these short- and long-term COVID-19-related behavioral changes.