California Fish Tacos | America's Test Kitchen

Ingredients

• 1 small red onion , halved and sliced thin
• 2 jalapeño chiles , stemmed and sliced into thin rings
• 1 cup white wine vinegar
• 2 tablespoons lime juice
• 1 tablespoon sugar
• 1 teaspoon salt
• 3 cups shredded green cabbage
• 1/4 cup pickling liquid from pickled onions
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1/2 cup mayonnaise
• 1/2 cup sour cream
• 2 tablespoons milk
• 2 pounds skinless whitefish fillets, such as cod, haddock , or halibut, cut crosswise into 4 by 1-inch strips
• Salt and pepper
• 3/4 cup all-purpose flour
• 1/4 cup cornstarch
• 1 teaspoon baking powder
• 1 cup beer
• 1 quart peanut or vegetable oil
• 24 (6-inch) corn tortillas , warmed
• 1 cup fresh cilantro leaves