Across nine studies (N=1,672), we assessed the link between cognitive costs and the choice to express outrage by blaming. We developed the Blame Selection Task, a binary free-choice paradigm that examines the propensity to blame transgressors (versus an alternative choice)—either before or after reading vignettes and viewing images of moral transgressions. We hypothesized that participants’ choice to blame wrongdoers would negatively relate to how cognitively inefficacious, effortful, and aversive blaming feels (compared to the alternative choice). With vignettes, participants approached blaming and reported that blaming felt more efficacious. With images, participants avoided blaming and reported that blaming felt more inefficacious, effortful, and aversive. Blame choice was greater for vignette-based transgressions than image-based transgressions. Blame choice was positively related to moral personality constructs, blame-related social-norms, and perceived efficacy of blaming, and inversely related to perceived effort and aversiveness of blaming. The BST is a valid behavioral index of blame propensity, and choosing to blame is linked to its cognitive costs.