4 medium jalapeños (about 8 ounces total)
1/2 cup white vinegar
1/2 cup water
1 tsp. to 1 tbsp. salt
1 tsp. to 1 tbsp. sugar (optional)

  • slice jalapenos and fill 16-20 oz. jar
  • add vinegar and water, topping up with vinegar to cover the jalapenos
  • add salt and sugar
  • tighten lid and shake to thoroughly mix salt and sugar into liquid
  • refrigerate 8 hours, and keep refrigerated

source: https://www.washingtonpost.com/food/2021/09/28/pickled-jalapeno-recipe/