Make my Grandma's fluffy white frosting to decorate your favorite cakes or cupcakes! It's a simple recipe I've used for over 45 years.
Place milk, cornstarch and a dash of salt in a medium saucepan. Stir or whisk to combine ingredients. Cook on LOW heat, stirring often, until mixture thickens. Once mixture thickens, remove it from the heat; set it aside to cool.
In a separate large mixing bowl (or stand mixer), mix together vegetable shortening, butter, granulated sugar and a portion (2/3 cup) of the powdered sugar. Beat these ingredients REALLY WELL for about 15 minutes, until creamy. NOTE: It is important to take the time to mix really well, so the granulated sugar is dissolved and is no longer "grainy".
Add vanilla extract, and the completely cooled, thickened milk mixture. Beat ingredients well, until fully incorporated into the frosting.
Add remaining cup of powdered sugar to the frosting. Mix well until fully combined. Now the frosting is done. It should be fluffy and light in texture, and ready to use. Will make enough frosting to fully cover a 2 layer round cake or 2 dozen cupcakes.
NOTE: The total amount of frosting is enough to cover two round cake layers, OR a 13x9 cake, OR 2 dozen cupcakes. * Caloric calculation is for total amount of frosting, using butter.
Grandma's Fluffy White Frosting https://www.thegratefulgirlcooks.com/grandmas-fluffy-white-frosting/