A show of hands, please, how many of people (on this sunny island, at least) have encountered problems when using cups instead of the weighing scale? Perhaps it's just me but I would like to think that my problem, with the latest yogurt cake, lies not in the size of the cups but most likely in the size of the eggs. I bought this last batch of eggs from the market, 10 for S$2.10. These are likely to be slightly bigger than 60g each.
I know I am not the only person who have problems with this recipe. I used oranges instead of grapefruit. After an earlier unsuccessful attempt with another yogurt cake, I approached this with a proper plan. make a more conscious effort to scoop (and flatten) the 1.5 cups of flour
mix the eggs, yogurt and sugar together, then add oil (to prevent over mixing flour later)
use the balloon whisk to fold in flour, not more than 15 strokes (a tip I found here, see "Batters") bake at a slightly lower temperature (than 180 deg C).
With all the above checked, I put the tray in to bake. All looked and smelled well, and I drenched the cake with OJ from two oranges. And waited... but I could wait no longer and cut the cake when it was cooled enough.
After uttering a silent prayer, I picked up one piece of cake. I should have suspected when there wasn't any crumbs, it's another kueh :(