Preheat your oven to 350°F (175°C). Line a 9-inch springform pan with parchment paper and lightly grease the sides.
In a large bowl, whisk together oil, sugar, eggs, and vanilla. Stir in the flour, cocoa, salt, and baking powder until smooth.
Pour brownie batter into the pan and spread evenly. Bake for 25-28 minutes or until a toothpick inserted comes out with moist crumbs. Let cool completely.
For the cheesecake, beat the cream cheese until fluffy. Add both sugars and beat again until smooth.
In a separate bowl, whip the heavy cream until stiff peaks form. Fold the whipped cream into the cream cheese mixture gently until combined.
Spread the cheesecake filling over the cooled brownie layer. Smooth the top and refrigerate for at least 4 hours or overnight.
Before serving, whip the topping cream with powdered sugar until soft peaks form. Spread or pipe over the cheesecake.
Arrange sliced strawberries over the top in any design you like.
Slice with a warm knife and serve cold. Store leftovers covered in the fridge for up to 4 days.