Caramelized Onions | America's Test Kitchen

Ingredients

• 3 pounds onions , halved and sliced through root end 1/4 inch thick
• 13 tablespoons water (3/4 cup plus 1 tablespoon)
• 2 tablespoons vegetable oil
• 3/4 teaspoon salt
• 1/8 teaspoon baking soda