1. Preheat the oven to 180 degrees Celsius.

2. In a bowl, combine the flour, baking powder, baking soda, and cocoa powder.

3. Add the vanilla essence and canola oil.

4. Stir the ingredients well until they form a smooth batter.

5. Grease a baking pan with some oil and pour in the batter.

6. Bake the cake for about 30-35 minutes or until it is cooked through.

7. Allow the cake to cool completely before removing it from the pan and serving.