• Preheat the oven to 350F then line an 8x8 inch baking pan with parchment paper and set aside.
• In a microwave-safe bowl melt the butter, oil, both sugars, and cocoa powder together in 30-second intervals mixing in between every time. Once fully melted microwave for another 1 minute and stir vigorously to allow the sugar to melt fully and emulsify with the fats.
  2/3 cup butter, 2 tbsp vegetable oil, 3/4 cup granulated sugar, 1/4 cup brown sugar, 2/3 cup cocoa powder
• Whisk in the eggs one at a time then add in the vanilla. You want the batter to pull from the bowl a little bit.
  2 egg, 1 tsp vanilla extract
• Add in the flour, and the salt and fold just until combined. Fold in the chocolate chips.
  1/2 tsp salt, 2/3 cup all purpose flour, 1/2 cup semi-sweet chocolate chips
• Pour the batter into the parchment paper-lined 8x8-inch baking pan and spread evenly. Bake in the preheated oven for 30 minutes.
• Allow the brownies to cool down fully on a wire rack before slicing into them for the perfect square crinkle top slice every time.

If you decide to add the spider webs follow these directions.

• Once the brownies cool down, melt the marshmallows in the microwave for 20 seconds. Stir well then allow that mixture to sit for 1-2 minutes to cool down.
  3/4 cup mini marshmallows
• Using two forks, pull the marshmallow mixture over the brownies to create the spider web look. You can also use your hands but be careful the marshmallow mixture is warm so you might not be able to handle it, in that case just use the forks!