Sometimes we put this frosting into a pastry bag and pipe it into cupcakes for a nice little surprise for our beloved customers.
Measure the shortening and the margarine into a mixing bowl. Using a hand mixer set on medium speed, cream this mixture for about 30 seconds, stopping once or twice to scrape the bowl. Add the remaining ingredients. Using a hand mixer set on low speed, beat this for about a minute, stopping once or twice to scrape the bowl. Raise the speed to medium-high and beat for an additional 2-3 minutes, until light and fluffy, stopping a few times to scrape the bowl.
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