Combine walnut, plain flour, brown sugar, baking powder, butter, egg and NESCAFÉ mixture in a bowl of electric mixer.
Beat on low speed until all ingredients are well combined, then beat on medium speed for 4-5 minutes or until the mixture becomes smooth.
Turn the mixture into two greased 20cm round baking tins and bake in a 170°C preheated oven for 25 minutes or until a skewer is inserted into the cake and comes out clean. Leave cakes for a few minutes and then turn them out and set aside to cool.
For the filling:
Mix the cheese with NESTLÉ Sweetened Condensed Milk and butter in an electric mixer until mixture becomes smooth.
Put one sponge cake on a serving plate and spread half of the cream mixture on top. Sprinkle with walnuts. Top with the other sponge cake then spread the remaining cream and decorate with the whole walnuts.