In a mixing bowl, stir together oil and cocoa powder until combined. Add sugar, Califia Farms Mocha Cold Brew, vanilla extract. Stir until well combined.
Mix in flour, baking soda, salt, and cinnamon until the batter is smooth and shiny. Transfer batter to an 8x8 baking dish.
Bake for 35-45 minutes or until a knife inserted comes out clean. Allow to cool completely before slicing. Enjoy!