Castella Cake

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Ingredients:

• 100g or 1/2 cup milk
• 100g or 7tbs unsalted/salted butter
• 100g or 1 cup flour (低筋）
• 6 egg yolks
• 6 egg white
• 100g or 1/2 cup Sugar
• Vanilla extract or lemon juice

Instruction:

1. Heat oven at 300F. Place a pan with water in the oven.
2. Melt milk and butter on pot in low heat. 
3. Then mix well with flour. 
4. Then add in the egg yolks and mix well.
5. Beat eggs white and gradually add in the sugar. Add lemon juice or vanilla extract. Beat till firm peak.
6. Then fold the egg white into the ingredients in 3 batches.
7. Bake at 300 F for 1 hour.