Preheat oven to 350°F (175°C). Grease and flour a 9x5-inch tube pan.

In a large bowl, whisk flour, sugar, and cocoa powder. Add eggs one at a time, then mix in oil and milk.

Stir in chocolate chips and baking powder. Pour batter into prepared pan.

Bake for 20-25 minutes or until a toothpick comes out clean. Let cool completely in pan.

While cake cools, beat cream cheese and powdered sugar until fluffy. Add heavy cream and vanilla, mix until smooth.

Spread cream filling over cooled cake. Roll cake into a tube and transfer to a serving plate. Decorate as desired.