1 First, prepare a proper amount of flour, not too much flour, depending on the capacity of your own oven.

2. Pour the flour into the baking tray and spread it evenly, then put it in the middle layer of the oven and bake at 150 degrees for 20 minutes.

3. After baking, let it stand for a while until the flour is completely cooled.

Finally, sift the flour with a sieve, and the cooked flour will be ready.