Step 1: Make the Brownie Base

1. Preheat your oven to 350°F (175°C) and grease a 9-inch springform pan.
2. In a bowl, whisk together flour, cocoa powder, sugar, baking powder, and salt.
3. Stir in vegetable oil, eggs, and vanilla extract until just combined.
4. Pour the batter into the prepared pan and spread evenly. Bake for 20 minutes or until the top is set. Let it cool slightly.

Step 2: Prepare the Cheesecake Layer

1. In a large mixing bowl, beat the softened cream cheese and sugar until smooth.
2. Add the eggs one at a time, beating well after each addition.
3. Mix in the vanilla extract.
4. Pour the cheesecake mixture over the cooled brownie base and smooth the top.

Step 3: Bake the Cheesecake

1. Reduce the oven temperature to 325°F (165°C).
2. Bake the cheesecake for 35-40 minutes or until the center is set but slightly jiggly.
3. Let it cool at room temperature, then refrigerate for at least 4 hours or overnight.

Step 4: Make the Edible Cookie Dough Topping

1. In a mixing bowl, cream the butter, brown sugar, and white sugar until fluffy.
2. Mix in vanilla extract, then gradually add heat-treated flour and salt.
3. Stir in the milk until the dough reaches your desired consistency. Fold in the chocolate chips.

Step 5: Assemble the Dessert

1. Spread the cookie dough evenly over the chilled cheesecake layer.
2. Garnish with extra chocolate chips if desired.

Step 6: Chill and Serve

1. Return to the fridge for 30 minutes to allow the layers to set.
2. Slice and enjoy!