Wash the oranges and lemons. Cut into pieces without peeling them and place them in a bowl. Cover with water and place the bowl covered in the fridge for 48 hours.

When the 48 hours have passed, blend them in the blender (removing pips if there are any) and measure one cup sugar for each cup pulp.

Boil over medium heat for 20-25 minutes, add the vanilla and store into jars (when you open a jar, preserve it in the fridge).