4 large sweet onions, sliced 1/4″ and separated into rings
1 1/2 teaspoon baking powder
1 cup flour
1/2 teaspoon salt
2/3 cup water
Soak the onion rings in ice water for at least 1/2 hour. Pat the onion rings dry with Paper towels. Sift together the baking powder, flour, and salt. Combine the egg, water, and lemon juice and beat until frothy. Stir this into the dry ingredients just until blended. Add butter.
Dip onion rings into batter, a few at a time. Drop into 375 F oil. Fry 2 minutes on each side, turning once drain on absorbent paper. Keep hot in slow oven (325 F) until all are cooked. Don’t crowd them
in the fryer.