Custard Buttercream

Name: Custard Buttercream
Prep time: 15 min
Cook time: 10 min
Total time: 85 min
Ingredients: 1 egg; 1 cup white sugar; 0.5 cup milk; 1.3333333730698 cups unsalted butter, at room temperature; 1 tablespoon rum; 1 teaspoon vanilla extract

4.4

(15)

13 Reviews

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Custard buttercream (German buttercream) is a very rich buttercream icing made with the addition of custard. You can change it up by adding different flavors or liquor. This is my basic time-tested recipe for decorating cakes and cupcakes. Makes enough buttercream for one 3- to 4-layer cake or 24 cupcakes.

Submitted by Lenam

Updated on August 11, 2024

8

Prep Time:

15 mins

Cook Time:

10 mins

Additional Time:

1 hr

Total Time:

1 hr 25 mins

Servings:

24

Yield:

24 servings

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Ingredients

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Original recipe (1X) yields 24 servings

1 egg
1 cup white sugar
½ cup milk
1 ⅓ cups unsalted butter, at room temperature
1 tablespoon rum (Optional)
1 teaspoon vanilla extract

Directions

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.
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.

Cook’s Note

It is important that custard is completely cooled before using or it will melt the butter. The custard can be made ahead and chilled in the fridge until needed.

This recipe contains quite a bit of butter, for ease of decorating with a pastry bag and to help the piped icing to hold its shape. If you don't intend to create elaborate decorations and just want to simply ice your cake, you can decrease the butter to 1 cup.

If you are using the buttercream to decorate a cake or cupcakes, make sure baked goods are cooled completely to prevent the buttercream from melting. For best results when using a pastry bag, chill the buttercream in bag in the fridge for 1 hour. Chilled buttercream creates better defined shapes when used for cake decorating.

Nutrition Facts (per serving)

130	Calories
11g	Fat
9g	Carbs
1g	Protein

Nutrition Facts
Servings Per Recipe 24
Calories 130
% Daily Value *
Total Fat 11g	13%
Saturated Fat 7g	33%
Cholesterol 35mg	12%
Sodium 6mg	0%
Total Carbohydrate 9g	3%
Total Sugars 9g
Protein 1g	1%
Calcium 10mg	1%
Potassium 14mg	0%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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