Preheat the oven to 350. Prepare an 8x8 glass pan by greasing the dish or for easier removal grease parchment paper and line baking dish.
In a small saucepan melt chocolate chips and butter together over low to medium heat, stirring often to prevent any burning.
In a large bowl, or using a stand mixer, beat melted chocolate butter mixture together with sugar until well mixed, add eggs one at a time and follow with maple extract. Then mix in cocoa and corn starch until well mixed.
Pour batter into prepared baking dish, spread to even out. Top with chopped salted peanuts.
Bake for 35-40 minutes or until the middle has just set. It's better to slightly undertake the brownies than to overcook them. If needed, rotate pan halfway through baking based on your oven's hot spots.
Once done, remove from oven and allow brownies to cool in pan for around 15-20 minutes. Continue to cool on a wire rack for as long as you can stand it. Once cool brownies may be cut and stored in an airtight container, if there are any left.