For the brownie batter, grease an 8" square pan and line it with parchment paper leaving handles on two sides for easy lifting. Preheat your oven to 180°C.
Melt the butter and chocolate in a microwave in 30-second intervals until the chocolate melts completely.
Combine the sugar and yoghurt in a bowl and add the cooled chocolate mixture.
Add in the flour, cocoa powder and baking powder and mix well.
Transfer the batter to the baking dish.
For the cookie dough layer, combine the melted butter and castor sugar till pale and fluffy.
Add the vanilla extract, flour and baking soda.
Combine all the ingredients and add in the milk 1 tbsp at a time (you may not require the entire quantity).
Take small scoops of the cookie dough and flatten it slightly before placing it over the brownie batter in patches.
Sprinkle dark and milk chocolate callets over the brownie and cookie dough.
Bake at 180°C for 30-35 minutes. Let the brownies cool completely before you cut them.
Recipe by Bake with Shivesh at https://bakewithshivesh.com/eggless-cookie-dough-brownies/