In a bowl, combine gizzards and onions. Pour over enough buttermilk to cover. Cover and refrigerate at least 8 hours (24 is better), or up to 2 days.
Drain gizzards in a colander, allowing any excess buttermilk to drip away. Cut gizzards into 1/2 chunks, working around any gristle or tendons.
Combine flour with salt, cayenne and seasoning. Beat egg in a small bowl.
In a pot or deep skillet, heat 1 1/2 to 2 quarts of vegetable oil to 350°F Dip each piece of gizzard in egg, then in flour. Be sure to coat them well or the coating will not be crisp.
Place coated gizzard pieces into oil and cook 2-3 minutes until golden brown and crisp. Drain on a rack. Serve immediately.

Kitchen-Friendly View

Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	301.8 Kcal (1264 kJ)
Calories from fat	58.7 Kcal
		% Daily Value*
Total Fat	6.52g	10%
Cholesterol	322.83mg	108%
Sodium	1354.47mg	56%
Potassium	476.7mg	10%
Total Carbs	30.4g	10%
Sugars	5.34g	21%
Dietary Fiber	1.45g	6%
Protein	27.94g	56%
Vitamin C	6.2mg	10%
Iron	2.9mg	16%
Calcium	135.6mg	14%

Amount Per 100 g
Calories	112.41 Kcal (471 kJ)
Calories from fat	21.86 Kcal
		% Daily Value*
Total Fat	2.43g	10%
Cholesterol	120.24mg	108%
Sodium	504.5mg	56%
Potassium	177.56mg	10%
Total Carbs	11.32g	10%
Sugars	1.99g	21%
Dietary Fiber	0.54g	6%
Protein	10.41g	56%
Vitamin C	2.3mg	10%
Iron	1.1mg	16%
Calcium	50.5mg	14%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.