Spread a layer of salt at the bottom of a cooker. Place a stand over it and close the lid. Preheat this on medium heat for 5-10 minutes and meanwhile, grease and line a 6-inch steel dabba.
Add the yoghurt to a bowl. Mix in the baking soda and in a few seconds the mixture will turn frothy and voluminous.
Now, whisk in the jaggery, melted ghee, milk and vanilla. Make sure to mix in everything well.
Add the ragi flour, whole wheat flour, cocoa powder and baking powder to the wet ingredients. Whisk in the dry ingredients but avoid overmixing at this stage.
Pour the batter into the lined dabba and add the chopped almonds over it.
Place the dabba on the stand and bake for 30-35 minutes or until a skewer inserted in the centre comes out clean.
Demould and slice once the cake is completely cooled.
Recipe by Bake with Shivesh at https://bakewithshivesh.com/ragi-chocolate-cake-in-a-dabba/