Preheat oven to 350°F and oil your preferred pan (small or large muffin tin, baking pan).
In a mixing bowl, combine EVOO, eggs, sugar, vanilla, baking powder, salt, cocoa powder and OLiV Balsamic Vinegar. Lastly, add the flour and fold in chocolate chips.
Pour batter into preferred pan and bake for 20-25 minutes, or until a toothpick comes out clean in the centre.
Remove from oven and let cool for at least 10 minutes.
When serving add an additional drizzle of OLiV Balsamic Vinegar.
Store in an airtight container for up to 3 days, or freeze for long-term storage.