1.5cupsunsalted butter, softened and cut into small cubes
1teaspoonpure vanilla extract
1pinchsalt
optionalgel food coloring for vibrant hues
Instructions
Begin by preparing a double boiler: fill a pot with a couple of inches of water and bring it to a gentle simmer. In a large, heatproof bowl, combine the egg whites and granulated sugar. Carefully place the bowl over the pot, ensuring that the bottom of the bowl does not touch the water.
With a whisk in hand, continuously stir the egg white and sugar mixture. Keep whisking until the granulated sugar completely dissolves and the mixture heats up to 160°F (70°C) on a candy thermometer. This process usually takes about 3-5 minutes. To test for doneness, you can rub a small amount between your fingers; it should feel smooth without any graininess.
Once your mixture reaches the desired temperature, carefully remove the bowl from the heat. Using an electric mixer fitted with the whisk attachment, beat the mixture on high speed until you achieve stiff, glossy peaks and the bowl feels cool to the touch, which typically takes around 8-10 minutes.
Gradually integrate the softened butter into the meringue, adding a few cubes at a time while mixing on medium speed. If at any point the mixture appears curdled, don’t worry! Just keep mixing, and it will transform into a velvety smooth buttercream.
After all the butter is incorporated, blend in the vanilla extract and a pinch of salt to enhance the flavor. If you desire colorful frosting, now is the time to add a few drops of gel food coloring. Mix until the colors are evenly incorporated and you reach your preferred shade.
Your luscious buttercream is now ready for your baking creations! If you’re not using it right away, store it in an airtight container at room temperature for up to 3 days, or refrigerate it for up to a week. Before using, allow it to return to room temperature and give it a quick re-beat to restore its fluffy consistency.
Notes
Store in an airtight container at room temperature for up to 3 days, or refrigerate for up to a week.