Preheat the oven to 325°F. Lightly spray an 13x9 baking dishwith cooking spray and line it with parchment paper. Spray the parchment paper with cooking spray.
In a medium bowl, combine the sugar, flour, cocoa powder, powdered sugar, chocolate chips, and salt.
In a large bowl, whisk together the eggs, oil, water, and vanilla extract.
Combine the dry mix into the wet mix and stir by hand until just combined.
Pour the batter into the prepared pan and use a spatula to smooth the top. Bake for 40 to 48 minutes, or until a toothpick comes out with only a few crumbs attached. NOTE: Do not overbake.
Cool completely before slicing.
Remove cooled brownie from pan and place onto a cutting board. Cut into 24 even "sticks".
VANILLA BUTTERCREAM DIRECTIONS
In stand mixer, cream butter, powdered sugar, and vanilla for about 2-3 minutes until smooth.
If the frosting is too thick, add heavy cream a teaspoon at a time to get the consistency you are looking for. If frosting is too thin, add more powdered sugar.
Put the frosting in a piping bag with a flat tip OR you can put the frosting in a gallon size Ziploc bag and cut off one corner of the bag. Pipe frosting over brownies in zigzag motion for mummy wrapping. Attach two eyeballs to each brownie.