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Tags and nutritional info are auto-generated and may be inaccurate. Always check the full ingredient list before cooking.
Separate the egg yolks and egg whites into two different bowls and set aside the bowl with egg whites.
Whisk the vegetable oil, milk, flour, baking powder, and salt into the bowl with egg yolks until smooth and set aside.
Add cream of tartar and sugar into the bowl with egg whites and whip until soft medium peaks.
Mix together the yolk mixture and the whipped egg whites.
Pour the batter into a baking tray and bake in an oven preheated to 170°C for 45 minutes or until golden brown.

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If you don't have cream of tartar, you can use 1 tsp lemon juice as a substitute.
Can I use plain flour instead of cake flour?
Yes, you can use plain flour as a substitute for cake flour in this recipe.
What can I use if I don't have vanilla bean extract?
You can use vanilla extract as a substitute for vanilla bean extract.
How do I know when the egg whites are whipped to soft medium peaks?
The egg whites should form peaks that hold their shape but slightly droop at the tip.
Can I omit the coffee in the milk mixture?
Yes, you can omit the coffee if you prefer a milder flavor.
What size baking tray should I use?
A standard 9x13 inch baking tray works well for this recipe.

