Milk Bar White Sheet Cake (Print Version)

# Ingredients:

→ Cake

01 - 115 g unsalted butter, room temperature
02 - 250 g granulated sugar
03 - 60 ml neutral oil
04 - 4 egg whites, room temperature
05 - 280 g all-purpose flour, spooned and leveled
06 - 8 g baking powder
07 - 2 g baking soda
08 - 1 g fine salt
09 - 360 ml buttermilk, room temperature
10 - 15 ml vanilla extract

→ Milk Soak

11 - 80 ml whole milk
12 - 5 ml vanilla extract

→ Frosting

13 - 225 g unsalted butter, room temperature
14 - 225 g cream cheese, room temperature
15 - 375–500 g powdered sugar
16 - 10 ml clear vanilla extract

→ Crumbs

17 - 95 g all-purpose flour, spooned and leveled
18 - 100 g granulated sugar
19 - 55 g brown sugar, packed
20 - 2 g baking powder
21 - 1 g fine salt
22 - 60 ml neutral oil
23 - 15 ml clear vanilla extract
24 - 40 g rainbow sprinkles

# Instructions:

01 - Preheat oven to 175°C. Grease and line a 23×33 cm baking pan with parchment paper.
02 - Cream butter with granulated sugar until light and fluffy. Add oil, egg whites, and vanilla extract, beating well after each addition.
03 - Incorporate flour, baking powder, baking soda, and salt. Alternate additions of dry ingredients and buttermilk, starting and ending with the dry mix. Mix just until combined.
04 - Transfer batter evenly into prepared pan. Bake for 25–30 minutes or until a toothpick inserted in the center comes out clean. Allow cake to cool completely in the pan.
05 - Mix milk with vanilla extract in a small bowl and set aside for assembly.
06 - Beat butter until fluffy. Add cream cheese and mix until smooth. Gradually incorporate powdered sugar, beating after each addition, then add clear vanilla extract.
07 - Combine flour, granulated sugar, brown sugar, baking powder, salt, oil, clear vanilla extract, and rainbow sprinkles in a bowl. Blend with a fork until clusters form. Spread on a lined baking tray and bake at 175°C for 20 minutes. Let cool completely.
08 - Cut cooled cake horizontally into two layers. Place the bottom sheet on a serving platter. Brush with half the milk soak.
09 - Spread a generous layer of frosting over the bottom cake sheet.
10 - Place second cake layer on top. Brush with remaining milk soak and frost top and sides evenly.
11 - Scatter baked crumbs liberally over the frosted cake surface.
12 - Allow assembled cake to rest for at least one hour before slicing for optimal flavor and texture.

# Notes:

01 - Ensure all dairy and egg ingredients reach room temperature for even mixing and superior cake texture.
02 - Avoid overmixing batter to maintain a tender crumb.
03 - Permitting the assembled cake to rest allows the milk soak to permeate and deepen flavor.