I've just put this into the oven and set them individually, I.e not in one big cake pan. Problem I encountered was I should've filled only a quarter way.
I got 20 small out and 1 very small cake tin as well.
Further to this, the recipe I received had no baking time, so I've played with 15mins to test, but left them in for 20mins. If you're baking this in a large cake pan, I'm hoping 30mins will be sufficient.
Beat four large eggs with 1 1/2cup sugar, 1t vanilla essence.
Sift in 1 1/2 flour and pinch salt. Fold in.
Sift 2tsp baking power over the mixture - DO NOT MIX in yet.
Separately, mix 1cup boiling water, 2tbl (I use a quarter cup of machine ground coffee) coffee, 1/2 cup and 2T oil (155ml oil).
Pour this hot mixture over the baking power (it'll fizz up like a volcano) fold in.
Bake at 180 I opted for a ganache, but this was the untested icing provided:125g butter, 1 1/2 icing sugar, 1T boiling water,1T milk, 2heaped tsp coffee, 2 heaped tsp hot choc powder.
Light and airy.
Lovely recipe and will attempt again in a large cake pan