Onion Rings & Fried Zucchini Ingredients Batter 1 cup flour 1 teaspoon salt (or more) 1 teaspoon baking powder 2 eggs 1/2 cup milk, plus 2 Tablespoons (add more if necessary—but it’s better to start out with your batter too thick and have to add a bit more milk: the thicker the batter the better