This custard buttercream recipe is a rich and creamy frosting that is perfect for cakes, cupcakes, and more. Its smooth texture and delicious flavor will elevate any dessert to the next level. With just a few simple ingredients, you can create this decadent frosting in no time.

Preparation time: 10 minutes | Cooking Time: 20 minutes | Total Time: 30 minutes | Serves: 12


  • 2 cups milk
  • 1/2 cup sugar
  • 4 egg yolks
  • 1/4 cup cornstarch
  • 1 tsp vanilla extract
  • 1 cup unsalted butter, softened


  1. In a saucepan, heat the milk until hot but not boiling.
  2. In a separate bowl, whisk together the sugar, egg yolks, and cornstarch until smooth.
  3. Slowly pour the hot milk into the egg mixture, whisking constantly.
  4. Return the mixture to the saucepan and cook over medium heat, stirring constantly, until thickened.
  5. Remove from heat and stir in the vanilla extract. Let cool completely.
  6. In a separate bowl, cream the butter until light and fluffy.
  7. Gradually add the cooled custard mixture to the butter, beating until smooth and creamy.
  8. Use immediately or refrigerate until ready to use.

Nutrition Information:

Calories: 250 || Carbohydrates: 18g || Protein: 2g || Fat: 19g || Saturated Fat: 12g || Cholesterol: 135mg || Fiber: 0g || Sugar: 15g

What I Love About This Recipe?

  1. The rich and creamy texture of the custard buttercream adds a luxurious feel to any dessert.
  2. The combination of vanilla and butter creates a delicious flavor that complements a variety of baked goods.
  3. This frosting is easy to make and requires simple ingredients that you likely already have in your pantry.
  4. It can be customized with different flavor extracts or colors to suit any occasion or theme.
  5. The smooth consistency of this buttercream makes it easy to spread or pipe onto cakes and cupcakes.

What To Avoid While Making this Recipe?

  1. Avoid overheating the milk, as this can cause it to curdle and affect the texture of the custard.
  2. Make sure to continuously whisk the egg mixture while adding the hot milk to prevent the eggs from scrambling.
  3. Allow the custard mixture to cool completely before adding it to the butter, as adding it while still warm can cause the buttercream to become too runny.
  4. Do not skip the step of creaming the butter until light and fluffy, as this is key to achieving the perfect smooth consistency of the buttercream.
  5. Store any leftover buttercream in an airtight container in the refrigerator, but allow it to come to room temperature before using it again to ensure a creamy texture.

With these helpful tips and a delicious custard buttercream recipe, you’ll be on your way to creating irresistible desserts that everyone will love. Enjoy!

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