Preheat the oven to 350 degrees.

Grease a 9x13 pan with no stick spray.

In a large microwavable bowl, melt the butter in the microwave at 50% power. Add in the sugar, vanilla, and eggs, mixing well. Next mix in the flour, cocoa powder, salt, and baking powder. Spread the batter in your prepared pan.

Bake for 25-30 minutes. Do not overbake.

While the brownies are still warm from the oven, make the ganache. Heat the cream and butter in a small saucepan until it is almost to the point of boiling. Remove from the heat and add in the chocolate chips. Whisk together until they are all melted and smooth. Add in the hazelnut spread and whisk again until smooth. This may be kind of runny. Pour it over the brownies. It will set up as it cools, though if you desire it to set up faster you may stick it in the fridge.