Using pasteurized eggs for making buttercream is a great idea to minimize the risk of bacterial contamination, especially if you're serving the buttercream to vulnerable
populations like young children, elderly people, or those with weakened immune systems. Pasteurized eggs are heat-treated to kill harmful bacteria without cooking the egg, so they’re a safer choice for recipes that call for raw or lightly cooked eggs.
In terms of texture and taste, pasteurized eggs work just as well as raw eggs in buttercream recipes. You might notice a slight difference in consistency or flavor if you're using a different brand or type of pasteurized eggs, but generally, the end result should be very similar. Just make sure to follow any specific guidelines on the pasteurized eggs' packaging and adjust your recipe as needed. Happy baking!