Few fast-food items inspire the devoted following that Sonic’s onion rings have cultivated over the decades. These were made fresh daily at every location; these aren’t your typical frozen rings. The secret that sets them apart is an unexpected ingredient that creates their signature sweet coating and incredible crunch.
Having worked at Sonic as a teenager, I can share the insider knowledge that transforms ordinary onions into the crispy, golden perfection that keeps customers returning. The magic ingredient? Vanilla ice cream melted into the batter, creating a coating that’s simultaneously crispy and subtly sweet.
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Table of Contents
Why Our Copycat Sonic Onion Rings Recipe is the best
The genius of Sonic’s onion rings lies in the three-step breading process that creates maximum crunch and flavor. The flour provides initial adhesion, the melted vanilla ice cream adds sweetness and helps the final coating stick, while the cornmeal delivers that signature crispy texture. The vanilla ice cream also contains dairy proteins that help create a golden-brown color when fried, mimicking the original vanilla ice milk mix used in restaurants.
Ingredients
- Spanish onions – Provide the ideal size, sweetness, and structure for perfect rings
- Water – Keeps onion rings hydrated and helps remove sharpness
- All-purpose flour – Creates the foundation layer for breading adhesion
- Vanilla ice cream, melted – The secret ingredient that provides sweetness and superior coating
- Cornmeal – Delivers the signature crispy, crunchy exterior texture
- Vegetable oil for frying – High smoke point essential for proper deep frying
How to Make Sonic Onion Rings
- Peel and cut onions into slices that are between 3/8 and 1/2-inch thick.
- Remove the small center of the onions, and you can chop those into diced onions for later use. See how to freeze onions.
- Separate onions into rings and place them into a large bowl of water.
- Place three containers in a row.
- Place flour in the first container, melted ice cream in the second, and cornmeal in the third.
- Heat oil to 350 degrees.
- Prepare onion rings by shaking off the water and dipping them into the flour. Shake off excess flour.
- Dip flour-coated onion rings into the melted ice cream and cornmeal. Gently shake off excess cornmeal.
- Place the battered onion rings on a cookie sheet to dry for a few minutes before frying.
- Fry onion rings in a deep fryer or heavy-bottom pot until golden brown.
- Drain your homemade onion rings on a wire rack to maintain crispiness. Do not lay them on paper towels, they will steam on paper towels.
- Serve with your favorite dipping sauce, like ketchup, honey mustard, bbq sauce, or the Sonic Smasher sauce.
Recipe Notes
I suggest using one hand for dry ingredients and the other for dipping the onion rings into the melted ice cream. It will be easier this way. These are messy but taste so good that you will never repurchase store-bought onion rings.
Frequently Asked Questions
It is because they are made with sweet onions and breaded with vanilla ice milk mix (or melted vanilla ice cream).
No, flour is one of the ingredients of the breading.
No, they are dipped in a milk mixture as part of the breading process.
Storage & Reheating Leftover Onion Rings
- Best Practice: Onion rings are best served immediately for optimal crispiness and flavor.
- Short-Term Storage: If necessary, store in refrigerator for up to 2 days in paper towel-lined containers.
- Reheating Method: To restore crispiness, reheat in a 350°F oven for 5-7 minutes or an air fryer at 350°F for 3-4 minutes. Avoid the microwave, as it makes the coating soggy.
Looking for more Sonic copycat recipes? Try these!
- Sonic Breakfast Burrito
- Sonic Dr. Pepper
- Sonic Frito Burrito
- Sonic Chili Cheese Tots
- Coconut Cream Milkshake
- Strawberry Lemonade Sonic
- Strawberry Limeade Sonic
- Cherry Limeade Sonic
- Root Beer Shake
- Ocean Water
Popular Fast Food Sides
- Popeye’s Cajun Rice
- KFC Fries
- Culver’s Fried Cheese Curds
Be sure to check out more of my easy side dish recipes and the best fast food copycat recipes.
Original Sonic Onion Rings Recipe (Easy Copycat)
Ingredients
- 2 pounds Spanish onions sliced, and rings separated
- 24 ounces water
- 2 cups all-purpose flour
- 12 ounces vanilla ice cream melted
- 8 ounces cornmeal
- vegetable oil for frying
Instructions
- Peel onions. Slice onions into slices that are between 3/8 and 1/2-inch. Remove the small center of the onions, you can chop those into diced onions. Separate onions into rings, and place the rings into a large bowl of water.
- Place three containers in a row. In the first container, place the flour, in the second container, place the melted ice cream, and in the third container place the cornmeal.
- Preheat oil to 350 degrees.
- Prepare onion rings by shaking off the water, dip onion into the flour, shake off excess flour. Dip into the melted ice cream, and then dip into the cornmeal. Gently shake off excess cornmeal. Place the onion ring on a cookie sheet to dry for a few minutes before frying.
- Fry onion rings until golden brown.
I am not real bright, but I could make these, and I thought they were great.
So glad you enjoyed the recipe.
I worked for Sonic back in the 80’s when I was a Teenager. I made so many Onion rings I could have turned into an Onion Ring! I cried every time & remember there was no cold water bath (unless it was just after the peeling for a few minutes). We peeled those onions at the same time we processed them for Onion Rings (don’t remember what kind of onions exactly). once peeled I beleive we dipped them in Buttermilk, then all purpose flour, then in the thawed Vanilla Ice Cream mix then in a final coating which I think was cornmeal (a more yellow dry mix). Then they all got put on trays & put into the Walk-in Coolers (sometimes over night to dry out) before they were ever put into the hot grease to fry. Man, I really wish I would have wrote the reciepe down, as I love Sonic Onion Rings! Calling on a current Sonic Employee to break their Silence & spill the Beans on this Sonic Onion Ring Recipe once and for all! I know I am pretty darn close if not right on the Money however! Prove me wrong Sonic Employee!!!
The guy who built the “original” sonic in Oklahoma had his wife dip the chilled onion rings in Eagle Brand Milk prior to rolling them in flour and meal.
The above recipe is correct onions were sliced and sat in a saltwater ice bath in the walk in over night dipped in the soft serve ice cream mix into the flour mixture, back in the ice cream then into the cornmeal mixture. I made these everyday for 4 1/2 years. I have tweaked it a little over the years in the flour I add salt, in the cornmeal garlic powder and bread crumbs. Also I dip back a few times to get plenty crispy. The family even the picky ones love this recipe. I only make them maybe twice a year, though to labor intensive.
From the time I was 13-16, I used to work at the Campus Dairy Sweet at the corner of Grand and National in Springfield, Missouri.
Famous for homemade banana ice cream.
We used the vanilla stuff that you would pour into the soft serve ice cream machines to coat the onion rings.
Come to find out, it was a front for a big gambling ring.
My boss, A. Galloway was a big time bookie.
All 400 pounds of him sat on a stool all day in front of an old fashioned pay phone installed behind the counter.
I always wondered why he wouldn’t let anyone touch it…
Then the place got busted.
Then someone bombed his house right to the ground.
Ah…the good ole days.
Good Golly Miss Molly!
I use to work at sonic when I was younger and one of my jobs was to prepare the onions for the onion ring orders. They use to soak the onion slices in an ice water bath for a while before breading and frying them. I certainly don’t remember ice milk involved.
i worked at sonic as well. you dip the onions in ice cream then flour then ice cream then medium cracker meal
I worked at sonic in highschool. They used the cream they put into the ice cream machine, some cornmeal and flour. I think these days they come pre-breaded…. we breaded our own in the 90s
its still the same way
Yes, I personally saw a Sonic employee bring (3) 50 pound sacks of giant fresh onions into the restaurant from an outdoor storage shed recently…
I worked at Sonic for 2 & a half yrs & it’s not ground corn meal but cracker meal but everything else is right 🙂
your correct… it was a fine cracker meal instread of corn meal
and yes it was vanilla ice milk
i managed sonics for 8 years in the 70’s and 80’s
Do you have recipe for vanilla ice milk ?
melt you some from the store
OK, I tried four recipes (all original–just created by the knowledge gained here and other sites) based on things I already had in the house.
1. Dip ring in 2% milk, then in flour, then in milk, then in crushed saltines crackers
2. 2% milk, flour w/lots of black pepper, then back in the milk, then crushed saltines.
3. 2% milk, Jiffy brand cornmeal muffin mix, then back in the milk, then crushed saltines.
4. 2% milk with pure vanilla extract, flour with lots of black pepper and a small handful of brown sugar (I was afraid the sugar would be hard to dissolve in the milk so I used it in the flour), then dip back in the milk, then in the crushed saltines.
I have to tell you–I liked all four recipes! #3 was my least favorite, #4 was my favorite.
Also, I felt that having thicker milk would have been beneficial (the ice cream mix mentioned here would have been thicker, so probably better to use). I wonder if putting corn starch in the milk wouldn’t be a cheap alternative to melting a box of ice cream.
Anyway, I also tried the #4 method on chicken breast strips (I did the flouring and crackering process twice for these–again, probably not necessary if I had thicker milk) and they turned out really good, too.
I also deep-fried a frozen Italian meatball after I battered it. And it was good, but not a favorite.
Those were terrible onion rings. There was barely any flavor at all. I had to add salt so there was a tad of flavor. Not recommended at all! :S
Worst onion rings I ever had. Tastes nothing like any Sonic onion ring I ever had, not even the same consistency.
I used to work next door to a Sonic. One day I asked one of the car hops how the onion rings were made and she told me that it was ice cream milk and crushed graham crackers.
I am thinking you were mislead. I don’t believe graham crackers, those would fry up really, really dark.
Thanks Seynard… The coating IS obviously cornmeal…
What is melted vanilla ice milk?
What is cracker meal?
It is saltine cracker crumbs.
it is a type of melted vanilla ice cream.
Morning Prep at Sonic back in the day entailed shredding fresh lettuce, slicing fresh tomatoes, peeling onions…chopping of the ends…slicing them…the pushing out the centers to be used for diced onions and pushing out the rings into a bucket of ice water…it was a process that made everyone cry! lol Then you built trays of rings…usually seven or eight trays a day where I worked…
The secret to Sonic back then…freshly prepped produce, those famous onion rings (not the same today) and the fryolators used animal fat!
Wasn’t it Borden’s Malted Milk? Maybe that was just my borther-in-law’s secret ingredient when he owned a Sonic…not sure.
I have never heard of that suggestion before, malted milk, makes a malt, a malt. I don’t think that is the flavor that is in the onion rings. Maybe another viewer can shed some light on this.
I also made thousands of Sonic onion rings. We used 50/50 milk/ice cream mix, then in the flour, then in 100% ice cream mix, then cracker meal. Works great with squash or green tomatoes, etc.
Yes, it was cracker meal. I remember that too. Fried pickles are made in the same fashion.
I worked for Sonic for one day in 1987. I needed some money til I got called to work at my “real” job so the manager agreed to let me work as little as one day or more. Turns out I got called for work that night, lol. My job at Sonic was to make onion rings. Yes. It was cracker meal, no way was it corn meal. But I don’t know what kind of cracker meal. It didn’t look like saltines but what else could it be? Graham crackers maybe? The unique things are that they dipped the ring in a milk solution (I don’t know what it was, but had the consistency of milkshake mix–so soft serve ice cream mix could very well be right), then into a flour mixture, then into the milk stuff again then into the cracker meal, then onto a big baking tray. Each ring leaned against the other to allow air between them. I remember they weren’t drippy wet and the rings didn’t really stick to each other as bad as you might imagine and the batter didn’t all run off. Everything held on nicely.
I remember being impressed that if a ring broke, it wasn’t served. The manager of that store was highly particular about quality. I’ve eaten at other Sonic’s and not had the same quality at all.
Once a tray was full of prepared rings, it would go in the freezer to be used later that day.
I don’t remember what kind of onion they used–Vidalia, perhaps? It is a sweet onion, and a good five or six inches in diameter.
Sonic literally makes their onion rings fresh every single day! Well they did in 1987 so I assume they do today as well. They had bags and bags of onions in the back room. Making rings for Sonic was one of the memorable pleasant experiences of my life.
That’s how I remember it too back in 1984. The woman always made them by hand in the back room by the fridge/freezer. They are NOT prepackaged onion rings; they are made fresh every day in the AM before lunch. She always had a “wet” hand, and a “dry” hand to use so she didn’t get ingredients mixed. I ADORE Sonic Onion Rings! I made some this evening that was identical! I had a major craving–OMG! I have NEVER purchased store bought onion rings. 🙂 Thanks Tom for sharing!
Terri- When you posted your comment in 2015 you said: “I made some [onion rings] this evening that was identical [to Sonic’s]” … could you please share your home recipe with us???
This is true, I was a carhop in the early 90’s, but they used bisquick instead of flour, the rest sounds about right.
This is true, I was a carhop in the early 90’s, but they used bisquick instead of flour, the rest sounds about right.
What is “vanilla ice milk”?
Using milk with a bit of sugar works well also. I use sugar water.