Heat oil in a deep-fryer or large saucepan to 350 degrees F (175 degrees C).
Stir club soda, flour, confectioners' sugar, egg, and vanilla together in a shallow dish until it's like a batter. Dip each candy bar in the batter to coat.
Fry candy bars in the hot oil until browned, about 3 minutes.
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The nutrition data for this recipe includes the full amount of the breading ingredients. The actual amount of the breading consumed will vary.
We have determined the nutritional value of oil for frying based on a retention value of 10% after cooking. The exact amount will vary depending on cooking time and temperature, ingredient density, and the specific type of oil used.