Marinate the Onions: Peel and slice the onions into 1/2-inch thick rings. Separate the rings. Mix together the buttermilk and hot sauce and pour over the onions. Marinate the onions for 1 hour.
Heat Oil: To prepare, heat approximately 6 cup oil in a heavy bottomed pot or dutch oven to 350°F.
In large bowl, use a whisk to sift together the flour, seasoned salt, seafood seasoning, onion powder, garlic powder, paprika and cumin.
Separate the seasoned flour using 1 1/4 cup for dredging. Mix the remaining 1 cup flour mixture with 12 oz beer stirring until the flour completely dissolves.
Remove the onions from the marinade allowing the excess to drip off. Immediately dredge lightly in the seasoned flour.
Dip into the beer batter letting the excess drip off. Carefully lower into the hot oil. (Don't crowd the oil, or the onion rings will stick together.)
Cook in batches until golden brown around 2 minutes, turning as needed for even browning. (Maintain the oil temperature around 350°-360°F.)
Remove from the oil using a slotted spoon. Arrange in a single layer on a sheet pan lined with paper towels to drain. While hot, sprinkle lightly with additional seasoned salt or seafood seasoning immediately after removing them from the oil.
Serve hot with Creole dipping sauce, if desired.
Creole Dipping Sauce: Place all of the ingredients into a blender and pulse until combined. Chill thoroughly for at least 2 hours prior to serving.(Yield: approximately 1 1/2 cups)
Air Fryer Onion Rings: Working in batches, place battered onion rings in the basket of an air fryer sprayed with cooking spray. (Spray onion rings, also.)Cook for 8 minutes at 365°F then check, shake basket and flip.Continue to cook for an additional 4-6 minutes or until crispy and golden brown. (Adjust times depending on how your appliance performs.)