Preheat your oven to 160°C/320°F (or 140°C/280℉ for fan/convection ovens. Line an 8x8-inch tin with baking paper.
Melt the dark chocolate and the butter together over low heat on the stove then set it aside to cool for about 10 minutes.
Place the sugar and eggs into a large bowl with the vanilla extract. Use an electric whisk or stand mixer to whisk them together for a few minutes, until pale and silky.
Fold the cooled melted chocolate mixture into the bowl. Then stir in the flour and cocoa powder.
Gently mix the white chocolate chips and freeze-dried strawberry pieces in then transfer the batter to your lined tin.
Bake for around 25-30 minutes, until the brownies have risen and have formed a crackly crust on top.
Leave the brownies in the tin until cool then transfer them to the fridge overnight to set. This will make them ultra fudgy and chewy.
Once set, drizzle melted white chocolate over the brownie slab then top with freeze-dried strawberry pieces.
Let the chocolate harden then cut the brownies into squares and enjoy!