Make this easy, stable vanilla Russian buttercream recipe with just four ingredients & five minutes & use it on all your favorite desserts!
In a mixing bowl with paddle attachment, beat butter on medium high speed until fluffy, about 3 mins.
Reduce the speed to low & slowly pour in the sweetened condensed milk. Then increase the speed to medium high & continue to beat until smooth & fluffy, about 2 mins
Stir in vanilla extract & salt. Whip again until incorporated, 30 seconds.