Add curd, baking powder and baking soda in a bowl. The quantity of all the ingredients is given in the recipe card below.
Give them a good mix.
Rest for 10 minutes.
In the meantime, put the walnuts in a blender jar.
Powder the walnuts. If you overdo blending, instead of powder, walnuts will turn into paste. So go for pulse mode for blending.
Also grease 9 inches baking mould. As we are using silicon mould, so no need of butter paper otherwise better to line the aluminium cake tin with greased butter paper.
Switch on the oven for preheating @180°C for 10 minutes with both the rods on.
Now add oil, milk, milk powder, powdered walnuts and sugar in curd.
Give them a good mix.
Put a sieve on the bowl.
Add whole wheat flour and salt.
Sift the flour into the bowl.
Add vanilla essence.
Mix well
Transfer the batter into the cake tin.
Top with some walnuts.
Put the cake tin in the middle rack of the oven.
Initially bake @180°C for 20 minutes with only lower rod on.
When 20 minutes are about to finish, turn the baking mode to both the rods on and again bake for 20 to 25 minutes.
Check by inserting the toothpick. If it comes out clean, it's a sign that cake is properly baked.
Let the cake cool down for 10-15 minutes on cooling rack.
Invert the cake from mould and then leave to cool completely.
Slice and enjoy.