Description
Inspired by Milk Bar’s playful and nostalgic desserts, this White Sheet Cake is ultra-moist, fluffy, and packed with rich vanilla flavor. Topped with a creamy frosting and optional sprinkles, it’s the perfect celebration cake for birthdays or any special occasion.
Ingredients
Scale
- 2 1/2 cups cake flour
- 1 tablespoon baking powder
- 1/2 teaspoon salt
- 3/4 cup unsalted butter, softened
- 1 3/4 cups granulated sugar
- 5 egg whites
- 1 tablespoon vanilla extract
- 1 cup whole milk
- 1/2 cup sour cream
- Sprinkles, optional (for topping)
Frosting:
- 1 cup unsalted butter, softened
- 3 cups powdered sugar
- 2–3 tablespoons heavy cream or milk
- 1 teaspoon vanilla extract
- Pinch of salt
Instructions
- Preheat oven to 350°F (175°C). Grease and line a 9×13-inch sheet cake pan with parchment paper.
- In a bowl, whisk together cake flour, baking powder, and salt.
- In a large mixing bowl, cream the butter and sugar together until light and fluffy, about 3–4 minutes.
- Add the egg whites one at a time, beating well after each addition. Stir in vanilla extract.
- Mix together milk and sour cream. Add dry ingredients to the wet mixture in three additions, alternating with the milk mixture. Begin and end with dry ingredients. Mix until just combined.
- Pour the batter into the prepared pan and smooth the top. Bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
- Allow the cake to cool completely in the pan before frosting.
- To make the frosting, beat softened butter until creamy. Add powdered sugar gradually, followed by cream, vanilla, and a pinch of salt. Beat until fluffy and spreadable.
- Frost the cooled cake evenly. Add sprinkles if desired. Slice and serve.
Notes
- Use clear vanilla extract for a classic ‘white cake’ flavor reminiscent of boxed cakes.
- Ensure all ingredients are at room temperature for best mixing results.
- You can double the recipe for a layered sheet cake or larger crowd.
- This cake stores well, covered, at room temperature for 2 days or in the fridge for up to 5 days.
Nutrition
- Serving Size: 1 slice
- Calories: 370
- Sugar: 35g
- Sodium: 180mg
- Fat: 18g
- Saturated Fat: 11g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 48g
- Fiber: 0g
- Protein: 4g
- Cholesterol: 45mg
Keywords: milk bar cake, white sheet cake, vanilla cake, birthday cake, fluffy white cake