Take oranges, wash them and grate their outer skin, but do not grate the white portion as it is bitter in taste. The grated part of orange skin is called orange zest.

Cut the oranges.

Take out their juice. Keep aside.

Take a pan and add water, sugar, orange juice, cinnamon stick and orange zest.

Put on a heat.

When the liquid begins to boil, boil for 6 minutes.

Keep stirring occasionally.

During the last minute, add lemon juice and blue food colour.

Mix well.

Take the pan off the heat and let it cool completely.

Sieve it in a clean bottle. This is curacao syrup.