Sludgecake aka Spongecake Disaster

I should have stopped when I realised there were no strawberries to be bought today. Wham bam just like that the strawberry season has ended. No warning - no nothing. One day we could buy mega punnets of the little gems and then the next day nada. Apparently the warm evenings are to blame. I guess we can't have it all can we? So anyway. What is a sponge cake without strawberries? I should have stopped. But no, I was in a cake making mood and being adventurous so I went ahead with my sponge cake mission.
I've only tried making sponges a couple of times before, and both were not memorable. But a friend of mine had said she makes sponges for a coeliac friend of hers..so I thought i would give it a whirl. I used the Edmonds recipe and exchanged the cup of normal flour for a cup of Bakels Gluten Free flour mix. And I used the gluten free baking powder mix from the NZ Allergy cookbook (see below for details). I don't know whether the ingreds are to blame or my method for the lack of height to the cake, perhaps it was a mix of both...but the finished result was a low level gluggy cake, ew. If I actually liked sponge cake I would work on my method using normal flour and try to perfect my sponge making ability...but I don't think it is worth it. Give me mudcake anyday!
As my husband says, at least the cream is fresh and tasty! And I found one last strawberry for it in our garden.