Original recipe Called for 1 cup of yoghurt and 1 cup of milk but the packet mix was bigger than my home brand 340g so I used less of both of these.
I sprinkled mini chocolate chips before baking.
Goes well in the freezer.
You could try with a flavoured yoghurt but remember they are usually sweetened.
I used Greek yoghurt and it turned out quite well and not too tart.
This cake does not rise as much as it usually would but it still seems a lightish cake, the acids in the yoghurt helps to aerate. It wasn't heavy like I thought it might be.
I'm going to try it with a chocolate mix next time.
I'm not sure how a mix from scratch would go but I don't see why it wouldn't work nicely as well.