Preheat oven to 180 C, 10 mins before baking. Grease a deep 20 cm/8 inch round cake tin; line base with baking paper. Beat ingredients in medium bowl on low speed with electric mixer until just combined. Beat on medium speed until mixture is smooth and changed to a paler colour. Pour mixture into prepared pan.
Bake cake in the preheated oven for 40-50 mins or until the skewer inserted comes out clean. Stand cake 5 minutes then turn onto wire rack; turn cake top-side up to cool. Dust cake with a little sifted icing sugar, if desired.
Notes
The batter might look curdled, but its ok, go ahead and bake it. If you want a caramel flavor, substitute 1 1/3 cups (275 gm) firmly packed brown sugar for the caster sugar.Baking in Pressure Cooker: If you dont have an oven/MW and still want to bake the cake, it's possible :). You can bake this in a pressure cooker. Suchitra, one of the dear readers of this space, tried baking it in a pressure cooker and it came out well. She was kind enough to share the method here. Please do check her comment in the comments section for the details. Thanks again Suchitra :)Substitutes:Substitution for self raising flour – to get 1 cup self-raising flour, add 1 1/2 tsp baking powder+ 1/4 tsp salt to 1 cup all purpose flour.Substitution for caster sugar: to get 1 cup caster sugar. process 1 cup granulated sugar (usual sugar) in a food processor/mixer until fine, but don’t powder it like icing sugar.