Preheat the oven to 350°F. Coat the bottom and sides of an 8-x 8-inch baking pan with cooking spray and line the bottom with parchment paper. Set aside.
In the bowl of stand mixer fitted with a paddle attachment or in a large mixing bowl, cream together the butter, vegetable oil, sugar and brown sugar until fully mixed.
Add the whole eggs, egg yolk, corn syrup, and vanilla, whisking until sugars dissolved and mixture is smooth, approximately 5 minutes.
In a small bowl, sift or whisk together the cocoa powder, flour, and salt.
Add the dry mixture to the wet ingredients, until just combined. Do not overmix.
Pour the batter into the prepared baking pan. Use an offset spatula to smooth the batter. Tap on the counter a few times to level.
Bake for 20-25 minutes or until they pass the toothpick test. Tops will be shiny.
Remove and cool on a wire rack for 15 minutes.
Arrange a wire rack over a rimmed baking sheet. Set aside. Run an offset spatula or butter knife around the edges of the pan and then invert the brownies onto the wire rack and let cool completely.
In a small saucepan over medium-low heat, heat the cream . Stir in the corn syrup, vanilla, and salt until fully mixed.
Remove from the heat and stir in the chocolate chips until melted.
Pour the ganache over the brownies, using an offset spatula to spread to the edges. Sprinkle liberally with candy coated chocolate chips while ganache is still tacky.
Refrigerate until ganache is set and then cut into 16 small squares, wiping the knife between each cut.