If you like pickled jalapeños, you'll love these pickled serrano peppers too. They're just as tangy and delicious...and even hotter. Try them on tacos, nachos, and more for a pop of spicy flavor! Note: I recommend wearing gloves when you slice the serranos to avoid irritating your skin.
Place the serranos and garlic in a (16-ounce) or similar lidded jar.
Heat the vinegar, water, sugar, and salt in a small saucepan over medium heat. Stir until the sugar and salt dissolve, about 1 minute. Pour the brine over the serranos. Let cool to room temperature, then cover and chill for at least 30 minutes before using.