It's probably one of the most popular methods to color eggs in Poland.
Eggs colored using natural ingredients are called "kraszanki".
Here are the instructions on how to do it.
You will need:
- desired amount of eggs
- 2 Tbsp vinegar
- onion peels (onion peels from one onion/two onions per one egg)
- pot with water
Place onion peels in a pot with water and vinegar. Boil for 20-30 minutes.
Transfer eggs into the solution and gently wrap each egg in onion peels, making sure that they are covered.
Boil 10-12 min or until desired color appears on your eggs.
You can also use eggs that were boiled before.
***Longer cooking gives better results, however it's not recommended to eat eggs that were cooked for too long - depends on what your purpose is. If you wish you could prepare a solution with onion peels one day in advance - boil onion peels and set a solution aside. Then place eggs in a solution the next day.
***When eggs are ready, decorate them by scratching different designs using a needle or razor, or leave them plain.
***Rub a little bit of oil over eggs to give them a nice shine :)