Browned Butter Buttercream
Source: Once Upon a Tier original.
3 sticks salted butter
1 1/2 pounds powdered sugar
5-6 tablespoons milk
1 teaspoon vanilla extract
1. Brown the butter. Place the butter into a saucepan. Melt the butter over medium heat, stirring constantly. Continue to cook and stir the butter until it starts to turn a golden brown (it will get very foamy before it starts to turn color). When the butter is golden brown and smells like toffee, remove it from the heat. Let the butter sit until cool. If you're like me, you will want to drink it at this stage. Instead, pour the butter into a container lined with plastic wrap. Place in the refrigerator until it is the consistency of softened butter (or refrigerate in until solid and then take out to soften).
2. Make the buttercream. In an electric mixer fitted with the paddle attachment, beat the softened browned butter on medium speed until fluffy. Add the powdered sugar and beat on low speed for 30 seconds. With the mixer still on, add the vanilla and milk, 1 tablespoon at a time, until the buttercream is the consistency you are looking for.Enjoy!