Adding a little "liquid gold" sweetened condensed milk to buttercream makes it feel extra special. It add that little bit of rich depth of flavor you can't get anywhere else!
Add vanilla and 3 Tablespoons sweetened condensed milk, beating until smooth.
Add powdered sugar, a cup at a time mixing until completely incorporated after each addition.
Turn mixer to high and beat for a couple of minutes, until light and fluffy.
Add a little more powdered sugar or sweetened condensed milk if necessary to get your desired consistency.
Use immediately or store in the refrigerator. To use from the refrigerator, bring to room temperature and whip slightly then use as normal.
Notes
This recipe is perfect for frosting a 9x13" cake or for spreading over a batch of cupcakes.If you are frosting a layer cake or like to pipe a nice mound of frosting on cupcakes, you may want to consider making 1½ batches.