1. Preheat oven to 450 degrees Fahrenheit. Line two baking sheets with foil and brush with three tablespoons oil each. Set aside.
2. Place 1/4 cup flour in a shallow dish. In a separate bowl, whisk together buttermilk and egg. Add remaining flour, salt and pepper, and mix vigorously until smooth. Set aside. Place the potato chip crumbs in a separate bowl.
3. Working one at a time, dredge each onion ring in the flour, shaking off any excess. Dip into the buttermilk mixture and then coat thoroughly in potato chip crumbs. Place on baking sheets.
4. Bake until golden brown, about seven to eight minutes per side. Drain on a paper towel and serve with Broccoli Cheddar Dip (recipe follows).
If buttermilk isn’t available, add one teaspoon lemon juice or vinegar to one cup of dairy or soy milk, and let sit for a few minutes.