Add all margarita ingredients to pitcher. Taste and adjust sweetness/strength of alcohol as desired.
To chill, either blend in a large handful of ice cubes to make frozen margaritas, or transfer half of the mixture at a time to a cocktail shaker with plenty of ice and shake vigorously.
For optional Chili Salt Rim, rub rim of each serving glass with a lime wedge, and immediately dip in chili powder/salt mixture. Then, fill each glass with one large or several small ice cubes. Pour margarita mixture into each glass, and garnish with lime wedges.