Preheat the oven to 350ºF. Grease a 9-inch baking dish with cooking spray and set it aside.

In a medium saucepan set over medium-low heat, combine the chocolate, butter and water. Cook, stirring, until the chocolate and butter are melted. Transfer the mixture to the bowl of a stand mixer fitted with the paddle attachment. Add the sugar and light brown sugar, mixing until combined, then add the eggs and vanilla extract and mix for 2 minutes.

Add the flour and salt and mix until combined. Transfer the batter to the prepared baking dish and bake for 25 to 30 minutes until a toothpick inserted comes out clean. Remove the pan from the oven and place it on a cooling rack. Once the brownies have cooled completely, invert the pan onto a cutting board and cut into 1/2-inch brownie croutons.

In the bowl of a stand mixer fitted with the whisk attachment, whisk the heavy cream, sour cream, sugar and vanilla extract on high speed until soft peaks form.

Fill each serving dish with alternating layers of brownie croutons, whipped cream and raspberries. Garnish each trifle with a sprinkle of mini chocolate chips and serve immediately.