As I awaited the arrival of my friends for game night, the aroma of frying onion rings danced through the air, teasing my taste buds. What makes these Quick Sourdough Discard Onion Rings a must-try is their delightful crunch paired with the genius twist of using leftover sourdough starter. Not only do they serve as the perfect snack for gatherings, but they also allow for waste reduction in the kitchen—talk about a win-win! With just a few simple ingredients and a crispy frying technique, you’ll have homemade onion rings that are sure to impress. So, are you ready to elevate your snacking experience and savor every bite?

Why Are These Onion Rings Special?
Crispiness Redefined: Each onion ring comes out golden-brown, boasting a satisfying crunch that will have you reaching for more.
Waste Not, Want Not: These rings ingeniously use sourdough discard, turning potential waste into a delicious treat.
Easy to Make: With only a handful of ingredients and simple steps, even novice cooks can master this recipe.
Versatile Pairing: Enjoy them hot with your favorite dipping sauces, like ketchup or spicy aioli, for a perfect snack.
Crowd-Pleaser: Impress your friends at game night or gatherings with this fun twist on a classic favorite! For more delightful dishes, check out my Sourdough Discard Crackers or try the creamy goodness in Garlic Pasta Comfort.
Quick Sourdough Discard Onion Rings Ingredients
For the Onion Rings
- Yellow Onions – Essential for flavor and structure; substitute with sweet onions like Vidalia for a milder taste.
- Sourdough Discard – Provides a unique flavor and contributes to the batter’s texture, making these onion rings a perfect use for leftover starter.
- Baking Powder – Creates a light, airy batter; ensure it’s fresh for the best results.
- Seltzer Water – Adds carbonation for a lighter batter; plain water can be used but will result in a less crispy texture.
- All-Purpose Flour – Coats the onions for better batter adhesion; whole wheat flour can be used for a healthier twist.
For Frying
- Oil (for frying) – Vital for achieving that sought-after crispy texture; use vegetable or canola oil for a neutral flavor.
Step‑by‑Step Instructions for Quick Sourdough Discard Onion Rings
Step 1: Slice the Onions
Begin by taking your yellow onions and slice them into rings roughly 1/4 inch thick. As you separate the rings, place them in a bowl and set aside. This step is crucial for achieving even cooking and a delightful texture when you fry these Quick Sourdough Discard Onion Rings.
Step 2: Prepare the Batter
In a mixing bowl, whisk together the sourdough discard, baking powder, and seltzer water until the mixture reaches a thin pancake batter consistency. Make sure the batter is smooth and free of lumps for optimal coating. The bubbles from the seltzer will ensure your onion rings turn out light and crispy.
Step 3: Dust the Onion Rings
Lightly coat each onion ring in all-purpose flour, shaking off any excess. This flour coating helps the batter cling better and contributes to a satisfying crunch in your Quick Sourdough Discard Onion Rings. Set aside the floured rings while you heat the oil.
Step 4: Dip in the Batter
One by one, take the flour-coated onion rings and dip them into the batter, ensuring they are well covered. Allow any excess batter to drip off before frying. This ensures a perfect, even coating that will fry up beautifully golden when you cook the onion rings.
Step 5: Heat the Oil
In a deep fryer or a sturdy pot, heat the oil to between 350°F and 375°F (176°C – 190°C). Use a thermometer to maintain the right temperature, as this is key to achieving crispiness without sogginess. Look for shimmering oil as an indicator that it’s ready for frying your Quick Sourdough Discard Onion Rings.
Step 6: Fry the Onion Rings
Carefully add the battered onion rings into the hot oil in small batches. Fry them for about 3-5 minutes, flipping them halfway after about 1 minute to ensure even cooking. Keep an eye out for a golden-brown color, which indicates that your onion rings are perfectly crisp and ready to be taken out.
Step 7: Drain and Season
Once cooked, remove the onion rings from the oil and place them on a plate lined with paper towels to drain excess oil. While they’re still hot, sprinkle a pinch of salt over the top. This step enhances the flavor and completes your Quick Sourdough Discard Onion Rings, ready for serving.

How to Store and Freeze Quick Sourdough Discard Onion Rings
Fridge: Store leftover onion rings in an airtight container for up to 2 days. To maintain crispness, reheat in the oven rather than the microwave.
Freezer: For longer storage, freeze uncooked, battered onion rings on a baking sheet until solid. Transfer to an airtight container and store for up to 1 month.
Reheating: When ready to enjoy, bake frozen onion rings at 350°F (175°C) for about 15-20 minutes, or until heated through and crispy.
Tip: Homemade Quick Sourdough Discard Onion Rings are best when freshly made, but knowing how to store and reheat them ensures you can savor those delicious flavors later!
Make Ahead Options
These Quick Sourdough Discard Onion Rings are a fantastic option for meal prep! You can slice the onions and coat them in flour up to 24 hours in advance, keeping them in an airtight container in the fridge to maintain their freshness. Additionally, you can mix the batter ahead of time, storing it in a covered bowl in the refrigerator for up to 3 days. When you’re ready to fry, simply let the batter sit at room temperature for about 15-20 minutes to ensure it’s at the right consistency. Fry the onion rings according to the original instructions for that crispy finish and enjoy homemade, restaurant-style snacks with less fuss on busy nights!
Expert Tips for Quick Sourdough Discard Onion Rings
-
Maintain Oil Temperature: Keep the oil between 350°F – 375°F to ensure the batter cooks evenly, preventing either sogginess or burning.
-
Avoid Overcrowding: Fry onion rings in small batches; overcrowding can lower oil temperature, leading to uneven cooking and less crispy Quick Sourdough Discard Onion Rings.
-
Dust with Flour: A light flour coating on the onion rings before dipping helps the batter stick better and creates that satisfying crunch.
-
Rest Before Frying: Let the coated rings rest for 5-10 minutes on a wire rack for extra crispiness, allowing the batter to adhere properly.
-
Use a Thermometer: Invest in a kitchen thermometer to precisely measure oil temperature; it’s crucial for achieving the ideal frying conditions for these onion rings.
Quick Sourdough Discard Onion Rings Variations
Feel free to get creative with this recipe and make these onion rings uniquely yours in a way that tantalizes your taste buds.
-
Sweet Onion Swap: Swap yellow onions for Vidalia or Bermuda onions for a milder flavor profile that still delivers a sweet crunch.
-
Spice It Up: Add 1-2 teaspoons of paprika or cayenne pepper to the batter for a delightful kick. The warmth from the spices can create a delightful contrast with the sweetness of the onions.
-
Herb Infusion: Mix in dried herbs like oregano or thyme into the batter for added flavor depth. Fresh herbs can also be a great option for brightening the flavor!
-
Gluten-Free: Use a gluten-free flour blend to make these delicious onion rings suitable for gluten-sensitive friends. Their crispy texture can be just as enjoyable!
-
Healthy Twist: Substitute half of the all-purpose flour with whole wheat flour for a healthier version without sacrificing too much crunch. This swap adds a nutty taste to your rings.
-
Cheesy Delight: Incorporate grated Parmesan or nutritional yeast into the batter for a cheesy flavor boost that harmonizes beautifully with the crispy exterior.
-
Garlic Lover’s Dream: Add minced garlic powder to your batter for an extra punch if you’re a fan of garlicky goodness. These onion rings can become your new favorite snack!
-
Dipping Sauces Galore: Serve with an array of sauces like ranch, honey mustard, or spicy aioli for a dipping experience that amplifies the joy of crunching into these onion rings. Also, if you’re in the mood for pasta, try pairing them with my cozy Garlic Pasta Comfort for a delightful treat!
Experimenting with these variations can lead you to new flavors, ensuring that each batch of Quick Sourdough Discard Onion Rings is as exciting as it is delicious!
What to Serve with Crispy Quick Sourdough Discard Onion Rings
As you indulge in the crunchy goodness of homemade onion rings, let’s explore delicious accompaniments that will elevate your meal.
-
Creamy Ranch Dip: A tangy ranch dip balances the crispy texture of the onion rings, perfect for those who love a creamy contrast.
-
Classic Ketchup: Nothing beats the nostalgic taste of ketchup, enhancing the natural sweetness of the onions while adding a zesty kick.
-
Spicy Aioli: This garlicky, spicy dipping sauce adds an exciting depth of flavor that pairs beautifully with the crispy onion rings.
-
Garden Salad: A refreshing garden salad provides a crisp, light contrast that complements the richness of the fried onion rings.
-
Coleslaw: The crunchy cabbage and creamy dressing of coleslaw create a lovely texture balance, offering a burst of flavor next to your rings.
-
Grilled Burgers: Juicy grilled burgers served alongside provide a hearty meal, perfect for game night or casual gatherings with friends.
-
Craft Beer: Pair your crispy quick sourdough discard onion rings with a cold craft beer; the bubbles and maltiness enhance the overall experience.
-
Sweet Potato Fries: For a fun twist, serve with sweet potato fries; their natural sweetness wonderfully contrasts with the savory onion rings.
-
Chocolate Brownies: End your meal on a sweet note with fudgy brownies, ensuring a delightful finish after indulging in crispy snacks.

Quick Sourdough Discard Onion Rings Recipe FAQs
How do I choose the best onions for my rings?
Absolutely! For onion rings, yellow onions are essential due to their robust flavor and structural integrity. However, if you prefer a milder taste, sweet onions like Vidalia also work well. Look for onions that are firm and have no dark spots or soft areas for the best results.
How should I store leftover onion rings?
Leftover Quick Sourdough Discard Onion Rings can be stored in an airtight container in the fridge for up to 2 days. To keep them crispy, reheat in the oven at 350°F (175°C) for about 5-7 minutes. This method helps retain the crunchy texture that makes them so delicious!
Can I freeze the onion rings for later use?
Yes, you can! To freeze uncooked, battered onion rings, lay them out on a baking sheet to freeze individually. Once solid, transfer them to an airtight container or freezer bag and store for up to 1 month. When ready to enjoy, bake them directly from the freezer at 350°F (175°C) for 15-20 minutes until crispy.
What should I do if my batter is too thick or too runny?
If your batter is too thick, add a little more seltzer water, one tablespoon at a time, until you reach a thin pancake batter consistency. Conversely, if too runny, sprinkle in a bit more flour to thicken it. The goal is a batter that clings nicely to the onion rings without dripping excessively.
Are these onion rings suitable for special diets?
These Quick Sourdough Discard Onion Rings can be made with gluten-free flour for those with gluten sensitivities. However, always check ingredients for other allergens, like baking powder or oils used for frying. Be cautious with any dips or sauces served alongside, as they may contain common allergens.

Crispy Quick Sourdough Discard Onion Rings You’ll Love
Ingredients
Equipment
Method
- Begin by taking your yellow onions and slice them into rings roughly 1/4 inch thick.
- In a mixing bowl, whisk together the sourdough discard, baking powder, and seltzer water until the mixture reaches a thin pancake batter consistency.
- Lightly coat each onion ring in all-purpose flour, shaking off any excess.
- One by one, take the flour-coated onion rings and dip them into the batter, ensuring they are well covered.
- In a deep fryer or a sturdy pot, heat the oil to between 350°F and 375°F.
- Carefully add the battered onion rings into the hot oil in small batches. Fry them for about 3-5 minutes.
- Once cooked, remove the onion rings from the oil and place them on a plate lined with paper towels to drain excess oil.

Leave a Reply