How to get fluffy blossoms that will stay soft till the next day and up to 3 days
I used Hong Kong Flour instead of cake flour or plain flour, as for the ovalette you can add about 1 1/2 teaspoon. Steamed for about 10 to 15minutes. Make sure you cover the steamer cover with clean and dried towel.
This is what I did everytime I make the blossoms. Another tips, place the blossoms (already cool) in a covered container and away from heat. Can be stored in room temperature up to a few days. Mine usually can be kept up to 3 days only as it will be gone within that days. Haa haa. Blamed it on my kids.
How to prevent vapour from getting into the blossoms
Covered the the steamer cover with clean and dried towel, if it gets too wet, change to a new one. That's what I did and also try to wipe the sides of the steamer where you steam the blossoms. A good steamer is a credit for a fluffy and soft blossoms too.
Sorry if tips are not too helpful.