Ingredient:

• 7 eggs
• 1 cup of flour
• 1/3 cup oil
• 1/3 cup water
• 1/2 cup sugar
• 1 pinch salt
• 1 teaspoon cream of Tartar
• 1 teaspoon vanilla flavor
• 1 teaspoon baking powder
• electrical mixer
• cake pan with hold in the center
  

Direction:

1. Separate egg yolk and egg white into 2 mixing bowls.
2. Beat egg yolk for 10 seconds, add flour, oil, water, vanilla flavor, baking powder, sugar and salt, then beat for about 1 minute at the lowest speed.
3. Beat egg white for 30 seconds, then add cream of tartar and beat for about 5 to 7 minutes with highest speed (stop when the egg white form peaks)
4. Fold (not stir) in the egg white into egg yolk.
5. Grease the baking pan with oil and set the oven 375ºF.
6. Bake the cake for about 30 minutes.
7. Then turn upside down to cook down.

Variation:
One can make chocolate, green tea or coffee angel food cake by adding coco powder or green tea powder or grounded coffee powder.  More sugar and water will be needed to compensate the additional powder.