Prepare the baking pan by lining it with parchment paper.

Strain the tofu through a sieve and place it in a bowl. Add the egg and sugar, mixing well after each addition.

Chop the dark chocolate finely and place it in a microwave-safe container with the milk. Cover loosely with plastic wrap and microwave at 600W for 90 seconds. Stir until melted.

Add the melted chocolate mixture to the tofu mixture and mix well. Sift in the flour and cocoa powder, then add the salt and mix until combined. Pour the batter into the prepared pan.