Soy Milk Box Cake!

These delicious cakes that are assembled in boxes are delicious and easy to transport! Perfect for picnics and any other occasion!
Prep Time:  45 minutes     Cook Time:  30 minutes
Yield: 5 600 mL Boxes of Cake
Ingredients
Sponge Cake:
- 
8 large eggs
 - 
100g cake flour
 - 
135g sugar
 - 
64g cold soy milk
 - 
64g oil
 - 
1/2tsp salt
 - 
1/2tsp lemon juice
 
Soy Milk Custard:
- 
700g soy milk
 - 
90g sugar
 - 
65g corn starch
 - 
4 egg yolks
 - 
180g cream cheese (softened to room temperature)
 - 
35g butter
 
Other:
- 
400g whipping cream
 - 
40g sugar
 - 
Soybean powder
 
Directions
For Soy Milk Custard:
- 
Mix sugar, corn starch and 100g soy milk in a bowl
 - 
Boil 600g soy milk in a pot, pour mixture from previous step in and quickly stir until fully cooked
 - 
Add butter and mix until melted
 - 
Let cool, then beat in room temperature cream cheese, adding a third at a time
 
​
For Sponge Cake:
- 
Mix egg yolks, 50g sugar, soy milk and oil in a large bowl
 - 
Sift in cake flour and salt and combine
 - 
Whip egg whites, remaining sugar and lemon juice until hard peaks form
 - 
Bake in sheet pan at 325 °F for approximately 20 mins
 
Assembly:
- 
Whip whipping cream and sugar
 - 
Cut cake into same size as box, with 2 pieces per cake
 - 
In each box, put a layer of cake, pipe a layer of whipped cream and a layer of soy bean custard
 - 
Sift a layer of soy bean powder at the top
 - 
(Optional) Chill in refrigerator and enjoy!
 



