<font color="aa00aa">Beat butter, sugar n ovalette until expand. (around 10 mins)
Add in eggs one by one and continue to beat (around 7-8 mins)
Slow down the mixer n add in condensed milk.
Turn mixer to slowest speed n add in HK flour n horlicks bit by bit. Beat until all evenly mixed.
Separate batter into 2 parts.
The first part, leave it.
Second part, add in Nutella n mix well.
Bake layer by layer.
On the chocolate layer, use a spoon to drip Nutella on it.
Continue baking layer by layer until all the batter is finish.
Bake at 180 to 210 degrees depending on your oven.</font>