Easy and Tangy Wahlburgers Pickles

Ingredients

• 2 cups (480 mL) white vinegar
• 1 cup (240 mL) water
• 1/4 cup (50 g) granulated sugar
• 2 tablespoons (30 g) kosher salt
• 1 tablespoon (15 g) mustard seeds
• 1 tablespoon (15 g) black peppercorns
• 4 cloves garlic, smashed
• 1 pound (450 g) pickling cucumbers, sliced into spears or rounds
• 1 small onion, thinly sliced
• 1 tablespoon (15 g) red pepper flakes (optional for heat)