Preheat the oven to 350 degrees F. (177 C) Next, mix the oil and the sugar together in a large bowl. Use a whisk or wooden spoon. Then add the eggs and the vanilla extract.
Add the dry ingredients to a sifter, the flour, baking powder, salt, and cocoa powder and sift them into the bowl with the batter. You can combine them in a separate bowl before adding if you don't have or don't want to use a sifter. Then stir it all together.
You can leave the batter as is or add chocolate chips and nuts.
Spray an 11x7 or 8x8 pan with cooking spray or grease it with shortening. Pour the brownie batter into the pan and spread it out with a spatula.
Put the pan in the oven and bake it for about 18 to 20 minutes, until a toothpick comes out clean. Once it is done, let it cool for about 20 to 30 minutes. This way when you cut into it, it will keep its shape.
Eat the brownies as is or top them with powdered sugar, frosting, sprinkles, coconut flakes, or eat them with some vanilla ice cream. Enjoy!