First boil the water in a container and place a glass bowl above it
Add chocolate and unsalted butter and mix it well
keep mixing until everything is dissolved and no lumps were formed
keep it separately, add sugar and mix it well
now add cocoa powder, vanilla essence and again mix it
add yogurt and mix it well
now place a sifter above the bowl and add flour and salt and sift it
now again mix it well and transfer it to a square baking tray
tap the tray to remove air bubbles
now bake it at 180°C/356°F for 25-30 minutes
let it cool
now cut it in equal sizes
your fudgy brownie is ready.