Line and 8x8 pan with parchment paper and preheat oven to 350F
Whisk wet ingredients for brownies, then fold in dry, and chocolate chips to the batter if you prefer
Pour and spread into your pan and bake for 23-26 minutes
For the ganache, melt chocolate and peanut butter together until creamy, then pour overtop brownies. Place in the fridge to set
Melt your white chocolate
Once the ganache layer is at least somewhat firm, dollop a circle of white chocolate onto the brownies (you'll make 9). Take the back of a spoon and drag that white chocolate circle to make a tail of the ghost
Place your candy eyes or use melted chocolate to dollop eyes and the mouth
Place in the fridge until all chocolate is set
slice and enjoy!