This recipe will be easier if you have a stand or a handheld electric mixer. However, it is possible to do it all by hand. Be sure to use the paddle attachment if using a stand mixer.
Step 1: Beat butter and vanilla until smooth.Step 2: Gradually add in powdered sugar.Step 3: Scraped the sides of the bowl several times while the ingredients mix.Step 4: Add 3-4 Tbsp heavy whipping cream (half & half or milk will work) until you have the consistency you prefer.