Bake the brownies

• Prepare the brownie mix according to the package instructions.
• Pour the batter into a lined baking dish and spread evenly.
• Bake until a toothpick comes out with a few moist crumbs.

Cool the brownies

• Remove the brownies from the oven and let them cool completely in the dish.

Make the tiramisu topping

• Whip the heavy cream with the sugar, salt and vanilla until soft peaks form.
• Add the mascarpone and instant coffee and beat until smooth and creamy.

Assemble and chill

• Spread the tiramisu topping over the cooled brownies in an even layer.
• Refrigerate until the topping is set.

Finish and serve

• Dust the top generously with cocoa powder.
• Slice into squares and serve.