½ cup of unsalted butter softened (about 1 stick)
½ cup of vegetable shortening
1 tsp vanilla extract
4 cups of sifted confectioner's sugar
1-2 tbsp of milk

Optional: ¾ cup of cocoa powder into sifted sugar and an additional 1 to 2 tbsp of milk for chocolate buttercream.

Add the softened butter and shortening to a large bowl with the dough paddle and mix on medium speed.

After mixed, add vanilla extract.

On low speed, add sugar at ½ cup at a time until combined.

Add milk..

At medium speed, mix for 1 or 2 minutes.