- 4 large egg whites
- 300 g granulated sugar
- 400 g soft unsalted butter, cubed
- 1 tsp vanilla
- 1 double boiler or bain-marie
- 1 whisk
- 1 stand mixer
Add egg whites and granulated sugar to a double boiler or bain-marie on low heat and whisk until all sugar is dissolved. Check by rubbing the mixture between your fingers.
Whisk in stand mixer on medium high speed for about 10 minutes until the mixture is completely cooled and fluffy.
Add soft unsalted butter, cubed to mixer on medium speed one cube at a time. Do not rush this step.
Add 1 tsp of vanilla.