Make the Brownies

1. Prepare the Brownie Batter: Preheat your oven to 350°F (175°C). Follow the instructions on the brownie mix box, adding eggs, oil, water, and vanilla extract. Mix until smooth.
2. Bake: Pour the brownie batter into a greased 8×8-inch pan. Bake according to the package instructions (usually 20-25 minutes) or until a toothpick comes out clean.
3. Cool: Let the brownies cool in the pan for about 15 minutes, then transfer them to a wire rack to cool completely before cutting into cubes.

Prepare the Cheesecake Filling

1. Beat the Cream Cheese: In a mixing bowl, beat the softened cream cheese until smooth using a hand mixer or stand mixer.
2. Add the Powdered Sugar: Gradually add the powdered sugar and vanilla extract, mixing until combined.
3. Whip the Cream: In a separate bowl, whip the heavy cream until stiff peaks form. Be careful not to overwhip.
4. Combine: Gently fold the whipped cream into the cream cheese mixture until fully incorporated. This will create a light and fluffy cheesecake filling.

Prepare the Raspberry Layer

1. Sweeten the Raspberries: In a bowl, gently toss the fresh raspberries with sugar if desired. Let them sit for a few minutes to release their juices.
2. Mash Half: If you want a bit of raspberry sauce in the layers, mash half of the raspberries with a fork to create a puree, leaving some whole for texture.

Assemble the Trifles

1. Layer the Brownies: Start by placing a few brownie cubes at the bottom of each glass or trifle dish. Press them down gently to create an even base.
2. Add the Cheesecake Layer: Spoon a generous layer of cheesecake filling over the brownies, smoothing it out with a spoon or spatula.
3. Add the Raspberries: Spoon a few whole raspberries (or raspberry puree) over the cheesecake layer.
4. Repeat Layers: Continue layering the brownies, cheesecake, and raspberries until your glass is full. Top with a final layer of whipped cream, fresh raspberries, and a sprinkle of chocolate shavings if desired.
5. Chill: Cover the trifles with plastic wrap and chill in the fridge for at least 2 hours before serving. This will allow the layers to set and flavors to meld.