Easy Custard Cake Filling


Use this custard filling recipe in cupcakes or your favorite layer cake. The microwave makes it foolproof! Use different extracts — like almond and mint — to vary the flavor.

Prep Time:
5 mins
Cook Time:
10 mins
Additional Time:
30 mins
Total Time:
45 mins
2 cups approximately


  • 2 cups milk

  • ¾ cup white sugar

  • 5 tablespoons all-purpose flour

  • ¼ teaspoon salt

  • 2 large eggs

  • 1 teaspoon vanilla extract


  1. Pour milk into a microwave-safe glass or ceramic bowl. Cook in the microwave on high until hot but not boiling, 2 to 4 minutes.

  2. Combine sugar, flour, and salt in a second microwave-safe glass or ceramic bowl. Whisk in hot milk gradually until incorporated. Cook in the microwave on high in 1-minute intervals, stirring after each interval, until thickened, 4 to 5 minutes.

  3. Whisk eggs in a medium bowl until pale and frothy. Whisk 1/3 cup milk mixture into eggs gradually, then whisk egg mixture into remaining milk mixture until smooth. Cook in the microwave on high until custard is thickened, about 2 minutes. Allow to cool slightly.

  4. Stir vanilla into custard until incorporated. Cool completely in the refrigerator before using, about 30 minutes.

Nutrition Facts (per serving)

140 Calories
3g Fat
26g Carbs
4g Protein
Nutrition Facts
Servings Per Recipe 8
Calories 140
% Daily Value *
Total Fat 3g 3%
Saturated Fat 1g 6%
Cholesterol 51mg 17%
Sodium 115mg 5%
Total Carbohydrate 26g 9%
Dietary Fiber 0g 0%
Total Sugars 22g
Protein 4g
Vitamin C 0mg 1%
Calcium 79mg 6%
Iron 1mg 3%
Potassium 115mg 2%

* 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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