Custard Buttercream

Name: Custard Buttercream
Ingredients: 1 egg; 1 cup white sugar; 1/2 cup milk; 1 1/3 cups unsalted butter, at room temperature; 1 tablespoon rum (optional); 1 teaspoon vanilla extract

6 ingredients

2 steps

Ingredients

1 egg
1 cup white sugar
1/2 cup milk
1 1/3 cups unsalted butter, at room temperature
1 tablespoon rum (optional)
1 teaspoon vanilla extract

Directions

1

Beat egg with a fork in a small, heavy saucepan. Mix in sugar and milk. Heat on medium-low heat, whisking constantly, until it just starts to boil. Continue beating rapidly until mixture thickens to a thin custard consistency. Remove from heat and cool completely, about 1 hour.
2

Beat butter in a bowl with an electric mixer until light and creamy, about 5 minutes. Add cooled custard, 1 to 2 tablespoons at a time, beating well after each addition. Beat in rum and vanilla extract. Keep beating until buttercream is very light and fluffy.