In an electric mixer, add the butter and start beating it for 5 minutes. Add the icing sugar one spoon at a time to get a nice consistency. Plus, it does not create a mess on your kitchen counter.
After the sugar is completely mixed with the butter, add the sauce and beat it for five more minutes.
Your frosting is ready, and you can keep it in the fridge to let it cool. Or you can use it on your desserts and let them cool to enjoy this delicious frosting made at home.
I usually make it in a large batch to use the leftover for storage.