Step 1

Whisk together your flour and sugar in a medium saucepan over medium heat. Cook for about 2 minutes to toast the flour.

Step 2

Slowly add in your milk, whisk to combine and bring your heat to medium-high. Whisk continuously until mixture is thickened and pudding like. Cover with plastic wrap and let cool.

Step 3

Add your butter to the bowl of your stand mixer and whisk on high until light and fluffy. Slowly add in your cooled flour mixture one spoon at a time as you whip. Incorporating slowly insures a smooth buttercream.

Step 4

Add in your vanilla and salt until everything is creamy and then you can frost your cooled cake.