Onion Rings Recipe with Dipping Sauce

Ingredients
Onion Rings Ingredients:
1 large sweet or yellow onion, thickly sliced into 1/2-inch thick rings
1 cup milk
1 Tbsp white vinegar
1/2 cup sour cream
1 cup all purpose flour
1/2 Tbsp salt
1/4 tsp black pepper
1 tsp garlic powder
Oil for frying, I used canola oil – use something with a high smoke point
Instructions
How to Make the best onion rings:
Heat a dutch oven or deep frying pan over medium heat with 1″ of oil (or enough to cover the onion rings). You can use a deep fryer if you have one.
In a medium bowl, whisk together 1 cup milk with 1 Tbsp vinegar and let sit 5 minutes. Whisk in 1/2 cup sour cream.
In a separate bowl, whisk together: 1 cup flour, 1/2 Tbsp salt, 1/4 tsp black pepper, and 1 tsp garlic powder.
Separate the onion rings and dip each ring in the milk mixture, then dredge with flour. (I used a fork to transfer from the wet bowl to the dry bowl so my hands didn’t get as gunky). Repeat by dipping in milk mixture a second time and dredging again in flour. Place the finished onion rings on a plate until ready to fry.
Once the oil is at 375˚F on a thermometer, or hot enough for the onion rings to sizzle, place 3-4 double battered onion rings in a single layer in the hot oil and cook for about 3 minutes, flipping halfway and fry until exterior is crisp and light golden brown. Let onion rings cool on paper towels so soak up any excess oil.
Dipping Sauce Ingredients:
1/2 cup real mayonnaise
1/4 cup sour cream
1/4 cup ketchup
1 Tbsp Worcestershire sauce
2 tsp creamy horseradish, or hot sauce
1 tsp ground paprika