Switch on the oven to pre-heat @180°C for 10 minutes with both the rods on.
Take a bowl and add 1 cup curd, 1/2 cup oil and 1 cup grated jaggery in it. You can reduce the quantity of jaggery if want a cake of mild sweetness.
Give it a good mix so that jaggery gets dissolved completely.
Add 1 tsp baking powder and 1/2 tsp baking soda.
Give them a good mix.
Leave aside for 5 minutes and you will find the mixture slightly frothy.
Put a sieve on the bowl and add 1.5 cup whole wheat flour, 1/4 tsp cinnamon powder and 1/8 tsp salt.
Sift the flour into the bowl.
Give it a mix.
Now start adding milk spoon by spoon and keep mixing to make the batter of ribbon consistency. Ribbon consistency means the batter should flow like a ribbon without breakage. We needed to add just 2 tbsp of milk to get the desired consistency.
Pour the batter in 8 inches cake tin lined with greased butter paper.
Sprinkle some finely chopped nuts of your choice. We used almonds, cashews and pistachios.
Tap the tin on the flour so that air bubbles get release, if any.
Place the tin in the middle rack of oven and turn the oven into 'only lower rod on' mode.
Bake @180°C for 30 minutes.
Thereafter turn the oven into 'both rods on' mode and bake further for 10 minutes.
Prick the toothpick and if it comes out clean, it means cake is properly baked.
Let cake cool down for 15 minutes.
Thereafter take the cake out of cake tin, remove the butter paper and leave the cake on cooling rack to cool down completely.
Your whole wheat Jaggery cake is ready. Cut into slices and enjoy.