Take 1 cup pitted dates in a bowl and pour boiling milk over them. Allow the dates to soak in water for half an hour.
Place walnuts on a baking tray and bake them for five minutes or till they turn brown. Take them out of the oven and when they are cold cut them into smaller pieces. Cut thin slices of 1/4 cup dates that were not baked in milk. Add a teaspoon of wheat flour and mix so that flour coats these walnut and dates pieces.
Preheat oven to 180 degree C. Put soaked dates along with the water in a blender. Now add melted butter to it and blend the mixture to a thick paste.
Pour this mixture in a mixing bowl. Add grounded cinnamon, grounded nutmeg, baking powder, and baking soda to the flour. Sift this dry mixture into the wet mixture. Add chopped walnuts and dates as well. Mix everything well.
Pour this batter into a prepared baking dish and bake at 180 degree Celsius for 40 minutes or till done. You may check by inserting a clean knife at the centre of the cake. If it comes out clean, then the cake is done.
Take it out of the oven and allow it to cool down. Cut slices and serve.