In a large bowl take butter and mix well till fluffy. add condensed milk and mix well.

Roughly chop milk chocolate and dark chocolate and place in Microwave for 30 seconds.Now take it out and stir continuously until the chocolate melts completely.

Add melted chocolate in the butter mixture and mix well.

Add 1/4 cup fresh orange juice, 1 tbls orange zest and and mix well.

Place the sieve and add in 1 cup maida, 1tsp baking powder, 1 /4 tsp baking soda and mix well using one side direction.

If the batter is thick, then add 2 tbsp milk and mix until the batter is a smooth thick consistency.

Transfer the cake batter into the greased square cake mould. Top with chopped walnuts and chocolate chips.

Place the tray into the preheated oven. bake the brownies at 180 degree celsius for 25 minutes. After 25 minutes check the centre of the brownies using a toothpick. If it comes out clean, that means the brownies is ready.

Remove brownies from oven. Allow it to cool down completely. Cut it into pieces.