Whip egg whites, 1/3 cup sugar, cream of tartar, salt and vanilla until peaks form. Boil 1 cup sugar and water slowly until 235 degrees temperature is reached. Then drizzle sugar syrup slowly into egg whites. Next add butter, bit by bit until smooth and well blended.
For the matcha, make a paste by sifting the matcha into a small bowl, then blend well with hot water. Add more water as needed until the paste can easily pour into the frosting. Continue whipping at medium high speed until well blended. Best to frost your cake immediately, or freeze your buttercream until you are ready to use it. Frosting can be re-whipped from room temperature.
Don’t forget to share it with a friend.
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