Pre-heat your oven at 180 degree C for 10min
Take a 7inch baking tin and grease it well with 1/2 tsp oil
Now dust with 1 tsp wheat flour and tap the cake tin so that it evenly dusted
Take a bowl and dissolve the jaggery in water
If its a block than grate it and add in water
Use a spoon to mix it well
You can drain the jaggery liquid in the strainer to avoid some dust particles
Now take another bowl and sieve the whole wheat at least for 3 times
Now add baking powder, cardamom powder and salt to it and use a rubber spatula or a spoon to mix well
Make a depression in the center and pour the jaggery liquid in it and mix it with a spatula or spoon
Don't whisk or blend it
Just mix the dry into wet
Now mix the oil to it and again don't blend or over mix
Pour into the cake tin and bake for 25-30 min or till it is done