Sift baking powder and plain flour, then
sift icing sugar. Separate egg yolks and egg whites for later use.
Beat butter and icing sugar in mixer
till fluffy. Remove.
Beat egg whites and sugar till stiff
peaks form. Add egg yolks and beat for about 2 minutes. Remove.
Add butter mixture and mix well by hand.
Pour in plain flour and baking powder to mix well. Divide into 2
portions. Pour each portion into separate baking tin. Add strawberry
essence and coffee essence respectively. Lightly swirl mixture till
colored patterns appear. Bake at 180 degrees Celsius for about 25
minutes. Remove and cool.