Science-Based (Academic) Resources Available
Academic science-based resources and recipes are those that have undergone appropriate testing and/or research to ensure the product is safe when prepared exactly as written.
Purdue University – Food Entrepreneurship and Manufacturing Institute
Kansas State University Extension - Non-TCS Buttercream Icing Recipe
https://bookstore.ksre.ksu.edu/pubs/food-safety-of-frostings-and-fillings_MF3544.pdf
Iowa State University Extension: Safe Frostings for Iowa 4-H Fairs
https://blogs.extension.iastate.edu/answerline/tag/buttercream-frosting/