An examination of literature on complementary feeding interventions in lower- and middle-income countries since 2000, this scoping review considered 64 behavior change interventions. Across the interventions, authors identified 28 out of a possible 93 behavior change techniques (BCTs), estimating effectiveness ratios for each. Certain BCTs showed promise and warrant further evaluation. Reviewers called for further implementation science research around BCTs and more publically available intervention details on the use of BCTs to optimize and scale up complementary feeding interventions.