Cut the room temperature butter up into pieces. Add in the butter pieces slowly to the flour mixture while you mix on medium speed.Add in half the liquid mixture and mix on medium speed, just until incorporated.
Cut the room temperature butter up into pieces. Add in the butter pieces slowly to the flour mixture while you mix on medium speed.Add in half the liquid mixture and mix on medium speed, just until incorporated.
Add in the last half of the liquid mixture and mix only until incorporated. Scrape down the sides of the bowl and mix again just until all the ingredients are mixed well.
Add in the last half of the liquid mixture and mix only until incorporated. Scrape down the sides of the bowl and mix again just until all the ingredients are mixed well.
To make the glaze:Melt the butter in a saucepan over low/medium heat. Once melted, turn off the heat and immediately add the brown sugar, vanilla and buttermilk. Stir until the sugar is completely dissolved. Add in the confectioner's sugar and stir well.
To make the glaze:Melt the butter in a saucepan over low/medium heat. Once melted, turn off the heat and immediately add the brown sugar, vanilla and buttermilk. Stir until the sugar is completely dissolved. Add in the confectioner's sugar and stir well.