Prepare ingredients: Thoroughly wash 12 pickling cucumbers. Slice cucumbers into ¼-inch thick slices or spears. Set aside. Smash garlic cloves and separate dill from thick stems. Also, sanitize mason jars by running them through the dishwasher.
Prepare brine: To make the brine, combine 4 cups water, 2 cups white vinegar, 2 tablespoons kosher salt, and 1 teaspoon sugar in a medium saucepan. Bring the mixture to a boil and swirl the pan to ensure the sugar and salt dissolve. Remove the pan from heat and cool to room temperature.
Make the pickles: Layer the prepared cucumbers with 1 bunch fresh dill, smashed 1 head garlic, and 1 tablespoon peppercorn kernels in the jars. Do not pack them super tight as you'll want room for the brine. Finish by adding enough brine to cover the cucumbers. Seal with an airtight lid and store in the refrigerator. The flavor is best if stored for at least one week, but they can be eaten at any time. Pickles should be good for at least 4-6 weeks after that.
