Brownie for kids who love chocolate

On the kids "goodbye party" at Flying color School who asked me the recipe of chocolate brownie. This recipe is originated from Joy of baking, i did test and adjust a bit according to materials we can get easily from any shop in Delhi.  It is quite an easy recipe and the brownie came out so good and yummy that my kids wanted to eat all the time so I make these brownie almost every 3-4 days and keep in the fridge.  Materials 100 grams dark chocolate, coarsely chopped. I used Bournville dark chocolate 40% cocoa (rich cocoa). 113 grams Salted butter, cut into pieces 200 grams granulated white sugar or breakfast sugar 1 teaspoon pure vanilla extract 2 large eggs (if you do not want to use eggs then 200 ml hung Yogurt - mean you put yogurt in a handkerchief and squeeze out the water from yogurt (dahi)) 95 grams maida  (all-purpose flour) Chocolate Ganache: 100 grams) semi sweet chocolate, chopped 80 ml heavy whipping cream (Amul cream) 14 grams salted butter (it is better if you can find unsalted butter but since it is quite difficult here so it is ok with Amul butter) How to make: Preheat oven to 325 degrees F (165 degrees C) and place rack in center of oven. Butter, or spray with a non stick vegetable spray, an 8 inch (20 cm) round or square baking moulding.  Melt the chocolate and butter in a large stainless steel bowl placed over a saucepan of simmering water until melted. Remove from heat and stir in the sugar until fluffy. Next, whisk in the vanilla extract and eggs (or yogurt), one at a time, beating well after each addition. Finally, stir in the flour (maida). Pour into the prepared pan and bake for about 25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Remove from oven and let cool on a wire rack.  Chocolate Ganache:  Melt the chopped chocolate, cream, and butter in a stainless steel bowl placed over a saucepan of simmering water. Remove from heat and let cool to room temperature and then spread the ganache over the brownies.If you would like to make some decoration can drop some Amul cream (kept chill in fridge) on the top of chocolate sauce and use toothpick to make line or heartshape...