Light and fluffy ~ incredibly airy like eating a 'cloud'
Author Ann Low
Prep Time 15 minutesmins
Cook Time 1 hourhr
Total Time 1 hourhr15 minutesmins
Course Dessert
Servings 6people
Ingredients
4egg yolks - used 65g egg
70gcaster sugar
50mlfresh milk
50mlcorn oil
50gcake flour or plain flour
2tbspcorn flour (starch)
1/2tspvanilla extract
1tbsppurple sweet potato flour (sifted) - or use cocoa powder/matcha powder
Meringue
4egg whites
50gcaster sugar
Instructions
Preheat oven temperature to 160 deg C. Sift cake flour and corn flour into a bowl, mix well and set aside.
Combine egg yolks and sugar in another bowl, mix well with a hand whisk. Add milk and vanilla extract, mix well followed by corn oil and blend well. Sift in flour mixture the second time into the egg mixture and stir well.
Make meringue - Beat egg whites and a pinch of salt until foamy. Add sugar in 3 separate rounds beat until egg whites are glossy, with stiff peaks. Fold egg whites into egg yolk batter in 3 batches.
Take out 1/4 of the batter (about 160g) into another bowl and gently fold in purple sweet potato powder with a rubber spatula.
Spoon 2 heapful tablespoons of the plain batter into the centre of the 7 inch removable cake pan (do not grease the pan). Then 1 heapful tablespoon of the purple sweet potato batter on top. Continue doing this until all the mixture has been used.
Bake in lower second rack of preheated oven for about 55 - 60 minutes. Invert cake immediately on a wire rack to cool completely before unmoulding