Take butter out 30 minutes early. It should feel soft to touch.
Don't microwave it or it'll melt. Room temperature butter is absolutely crucial here.
Put softened butter in your mixing bowl. Beat it on medium speed carefully.
Continue for about 3 minutes total. It should look pale and fluffy.
Add powdered sugar one cup at a time. Mix on low speed between additions.
This prevents a sugar cloud mess. Scrape down the bowl sides regularly.
Pour in the vanilla extract now. Beat everything together for 30 seconds.
The smell will be absolutely wonderful.
Pour in heavy cream one tablespoon first. Mix it in completely before adding more.
This controls the frosting's consistency perfectly. Add remaining cream as needed slowly.
Increase mixer speed to medium-high now. Beat for 3-4 minutes until light.
The frosting should look cloud-like. Add salt and mix briefly.