Mix canola oil and butter, add cocoa and stir until well blended.

Beat eggs with a mixer. Add sugar and vanilla, beat well.

Add flour and salt. Stir in chocolate chips.

Spread evenly in pan and bake at 350 for 20-25 minutes (mine took 22 minutes).

Allow to cool before cutting.

For the Frosting: In the bowl of a stand mixer beat the butter. Add the powder sugar and beat until combined. Add the cocoa powder and vanilla. Add milk 1 tablespoon at a time until your desired consistency is reached. Scrap down the sides of the bowl and whip one last time for 2-3 minutes to make sure the ingredients are mixed.

To make the spiders: Use a circle cookie/biscuit cuter to cut out your desired size of circles for the spider "bodies". Place on wax paper for prep, or place them right on your serving tray.

Take the black legs and stick four on each side of the spider, repeat with remaining spiders.

Pipe small spikes on the top of the brownies as the spiders hair. You can also just roughly smooth the frosting on with a knife.

Place two eyes on the edge of one end of the spider, making sure to use the frosting as glue for the eyes. Repeat with remaining spiders.

If desired sprinkle some black sprinkles on top of the frosting.

Serve or cover for up to four days.