Remove the tofu from the package, drain excess water and then process it in a food processor until smooth.
In a small saucepan, heat the almond milk over high heat until just boiling. Turn heat to low and add the chocolate chips. Stir until chips are fully melted. Add maple syrup and stir to combine. Turn off heat and add the vanilla.
Add the chocolate mixture to the tofu. Process until smooth. Use a rubber spatula to scrape down the sides if necessary.
Divide the mousse into four serving bowls. Garnish with raspberries and or chocolate nibs if desired.