Preheat oven to 350 degrees.

Coat a 8x8" pan with nonstick cooking spray.

Combine cocoa, flour, salt and baking powder and whisk together.

In a separate bow, combine melted butter, sugar, eggs, and vanilla. Mix to combine.

Pour dry ingredients into butter mixture and beat together.

Fold chocolate chips into batter.

Spread batter into prepared pan.

Bake 25-30 minutes.

Allow to cool completely.

Whip heavy cream until soft peaks form.

Then add powdered sugar and pudding mix and whip until combined.

Spread topping over cooled brownies.

Garnish by sprinkling with walnuts and chocolate chips.

Refrigerate until ready to serve.