Mix the topping ingredients and keep aside.
Cream butter and sugar till light and fluffy.
Add the commercial egg replacer which has been dissolved with water.
Fold in curd and vanilla.
Sift the flour, baking powder, baking soda and salt.
Fold in the curd mix.
The batter will be thick.
Spoon half the batter into a greased and lined tin.
Sprinkle half the topping over the batter.
Add remaining batter and sprinkle rest of the topping.
Bake at 180 degrees C for about 35 - 40 minutes or till a skewer comes out clean.