I used Mandy Chew’s recipe but I scaled it down to a 3 egg (large eggs) and omitted the baking powder and cream of tartar. I used my 7inch aluminium push pan from Lakeland.
You will find the quantities for the 3 egg version here:
Here is a link to Mandy’s original recipe:
You can use any biscuit instead of Oreo’s. This recipe produces a great chiffon.