Preheat oven to 350 degrees F. Grease a 9×9 square baking pan, or line it with parchment paper.
In a large bowl, mix together the oil, sugar, vanilla, and eggs.
Gradually add in the flour, cocoa powder, baking powder and salt. Stir until well combined.
Pour the batter into the pan and spread evenly. Sprinkle the marshmallows, Sprouts Candy Corn, and Sprouts Pumpkin Spice Pretzels on top.
Bake for about 30-35 minutes, or until a toothpick comes out with a few crumbs.