Preheat the oven to 350℉.
Spray a 13x9-inch baking dish, two 8- or 9-inch round cake pans, or a Bundt pan with cooking spray that includes flour. Or grease and flour your pan. Set aside.
Add the flour, sugar, cocoa powder, baking soda, and salt to a large bowl and whisk together. Then make a well in the center of the dry ingredients.
In a separate bowl or large measuring cup, add all the wet ingredients and whisk till well blended.
Pour the wet mixture into the well you made in the dry ingredients. Whisk everything together until there are no lumps and the ingredients are well incorporated.
Pour the batter into your prepared pan(s) and place in the preheated oven.
For a 13x9-inch pan, bake for 30-35 minutes. For two 8- or 9-inch pans, bake for 25-30 minutes. For a Bundt pan, bake for 40-50 minutes. Whichever pan you use, the toothpick test (inserting one in the center and having it come out clean) is also a good test for doneness.
Remove cake from the oven, place on a wire rack, and let cool completely in the pan. Remove from the pan, add your favorite frosting or glaze, and enjoy!