How to steam Boshan old cakes with one layer of white and one layer of yellow?

As follows:

Step 1

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Whole egg+sugar+milk will not disappear until the egg liquid is pulled out.

Second step

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Mix low flour+milk powder+baking powder+salt evenly. Add to the beaten egg mixture and stir well. Finally, add vegetable oil and stir well.

Third step

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Pour into an 8-inch square mold.

Fourth step

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Preheat the oven to 180℃ and bake for 30 minutes (if the surface color is heavy, it can be adjusted to 160℃ when igniting).

Step five

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Take it out after baking, cool it a little and cut it into pieces.