Seprate all the dry ingredient's for ex Refined flour,salt,baking soda

Then Whisk egg and sugar properly

Then melt chocolate in a butter on double boiler

Then mix the egg and chocolate mixture together

Then do proper dusting of a square mold and add some butter paper aside and in the bottom of the mold

Then add refined flour in the mixture of chocolate and egg and mixed it properly

Then bake at the temprature of 180 degree for 20-25 minute in the oven.