Make sure to properly wash and thinly slice all the jalapeños. Take a clean mason jar and add in all of the sliced jalapeños. Set aside.
In a saucepan, on low heat, add in water, white vinegar, salt and sugar.
Let it simmer and continue stirring until all the sugar is dissolved.
Once mixture (brine) is ready, turn off heat. Pour mixture (brine) over the jalapeños.
Let it cool at room temperature for at least 30 minutes.
Cover mason jar lid and store in refrigerator.
Notes
These pickled jalapeños will stay good in refrigerator for up to 2 months. While this recipe does not require garlic, you can add it in to infuse the flavor.