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Boiled Icing


  • 1/4 c flour
  • 1 tsp salt
  • 2 c milk
  • 2 c 4 sticks unsalted butter, softened
  • 2 c granulated sugar
  • 1 tbsp vanilla extract


  • In a large saucepan, whisk together flour and 1/2 cup of milk until smooth. Set over medium heat and and whisk in remaining milk and salt. Whisk constantly until mixture is thick and paste-like - AND SMOOTH. Remove from heat and let cool completely.
  • In the bowl of a stand mixer fitted with the whisk attachment, combine butter and sugar. Beat until light and fluffy. Add vanilla and mix well.
  • Beat cooled flour mixture into the butter mixture on high speed. Beat for several minutes (6-10) until sugar granules have dissolved and the mixture is super silky and fluffy. You can check this by rubbing a little between your thumb and forefinger.