Start by preparing the marinade in a bowl. Add the egg yolks in carefully.
Cover up the bowl to preserve freshness and place it in the refrigerator overnight.
Using a spoon, flip the egg yolks over and let them cure in the mixture for another 12 hours.
Your salted egg yolks are ready to eat!
Notes
You can also experiment with different types of soy sauce. Kikkoman soy sauce is a great choice, but you can also choose low sodium soy sauce if you want the yolks to be lighter in flavor. Remember that the egg yolks need to be evenly cured. To do this, you’ll need to flip the egg yolks at the 12 hour mark, so that the other side of the yolk also gets enough time to soak in the soy sauce mixture. If you’re not sure you’ll remember flipping the egg yolks at the 12 hour mark, you can make some extra marinade- enough that it should submerge the yolks.