There are some afternoons when the air in the kitchen needs to change. The usual quiet hum of the kettle just won’t do; you want the sharp sting of onion hitting hot oil and the promise of something golden and crisp. This copycat Outback Steakhouse Bloomin’ Onion is that kind of project. It’s the sort of cooking you sink into on a drizzly Saturday, a ritual that fills the house with a savoury warmth and rewards you with a glorious, shareable centrepiece that feels like an event.

Recipe Overview

• Preparation Time: 30 minutes (includes chilling the onion)
• Cooking Time: 6–8 minutes
• Total Time: Approximately 40 minutes
• Servings: 4–6 as a starter or snack
• Difficulty: Medium (requires a steady hand for cutting)

Why You’ll Love This Copycat Outback Steakhouse Bloomin’ Onion

• It transforms a simple vegetable into a dramatic, shareable centrepiece for the table.
• The seasoned flour and dipping sauce create a perfect balance of savoury, spicy, and creamy.
• It’s a wonderful way to slow down and spend a focused hour in the kitchen, enjoying the process.
• You control the seasoning and oil, making it fresher and cleaner than a restaurant version.
• The aroma alone is enough to gather everyone into the kitchen, asking when it’ll be ready.

Copycat Outback Steakhouse Bloomin’ Onion

15 min prep  ·  30 min cook  ·  4 servings

📌Save to Pinterest

Ingredients You’ll Need

• 1 large sweet onion (such as Vidalia or a Spanish onion), about 350g
• 500 ml whole milk
• 1 large egg
• 200 g plain flour
• 2 teaspoons paprika
• 1 teaspoon cayenne pepper
• 1 teaspoon garlic powder
• 1 teaspoon dried oregano
• 1 teaspoon fine sea salt
• ½ teaspoon freshly ground black pepper
• Vegetable oil, for deep frying (about 1.5 litres)
• For the dipping sauce: 200 ml mayonnaise
• 2 tablespoons tomato ketchup
• 1 tablespoon creamed horseradish
• 1 teaspoon smoked paprika
• ¼ teaspoon garlic powder

Tip: For the most tender petals, choose a large, round sweet onion. They have a higher sugar content, which gives a lovely mild flavour and helps them caramelise slightly at the edges during frying.

How to Make Copycat Outback Steakhouse Bloomin’ Onion

1. Prepare the onion: Peel the onion, leaving the root end completely intact. Place it root-side down on a cutting board. Using a sharp knife, make a cut from the top down to about 1.5 cm from the root. Repeat this cut all around the onion, creating 12–16 even wedges. Gently use your fingers to separate the outer petals. You should hear a slight squeak as they loosen.
2. Soak and season the milk: In a large bowl, whisk together the milk and egg until well combined. Submerge the cut onion completely. You’ll see the petals open slightly in the liquid. Cover and refrigerate for at least 30 minutes. This step makes the petals pliable and helps the coating stick.
3. Make the seasoned flour: In a separate large bowl, whisk together the plain flour, paprika, cayenne pepper, garlic powder, oregano, salt, and black pepper. The mixture should smell warm and slightly spicy, with a deep red hue from the paprika.
4. Coat the onion: Remove the onion from the milk mixture, letting any excess drip off. Place it cut-side down into the seasoned flour. Use a spoon to generously sprinkle flour between every petal. Lift the onion, shake off the excess flour, and place it on a plate. The petals should look thickly coated, like a dusty blossom.
5. Heat the oil: Pour vegetable oil into a deep, heavy-bottomed pot or a deep fryer. Heat it to 190°C (375°F). You’ll know it’s ready when a pinch of flour sizzles immediately on the surface.
6. Fry the onion: Carefully lower the onion into the hot oil, cut-side down. Use a slotted spoon to gently baste the top petals with hot oil. Fry for 3–4 minutes, until the base is a deep, rich golden brown. You’ll hear a steady, satisfying sizzle.
7. Flip and finish: Using two large spoons or tongs, carefully flip the onion over. Fry for another 3–4 minutes, until the petals are evenly golden and crisp. The kitchen will smell wonderfully savoury and toasty.
8. Drain and serve: Lift the onion from the oil and place it on a plate lined with kitchen paper. Let it rest for 2 minutes. This allows the steam to escape and keeps the petals crunchy. Serve immediately with the dipping sauce.

Tips From My Kitchen

• Keep the root intact: The root is the anchor that holds the whole blossom together. If you cut through it, the petals will fall apart in the oil. Measure the 1.5 cm carefully, and don’t be tempted to cut deeper.
• Chill the onion after cutting: A 30-minute rest in the milk mixture is not optional. It relaxes the onion’s structure, making the petals more flexible and easier to separate. It also helps the flour coating cling to every crevice.
• Use a deep, heavy pot: A wide, shallow pan can cause the oil temperature to drop too quickly when you add the onion, leading to a greasy result. A deep pot maintains a steady heat and gives the petals room to expand.
• Don’t skip the resting step after frying: That 2-minute rest on kitchen paper is crucial. It allows excess oil to drain away and the steam to escape, which prevents the coating from becoming soggy. The petals will stay crisp for longer.
• Work in a single batch: This is a single-serving showstopper. Trying to fry two onions at once will overcrowd the pot, drop the oil temperature, and result in uneven cooking. Give it the space it deserves.

Common Mistakes to Avoid

• Overcrowding the pan: As mentioned, the oil temperature is your best friend. Adding too much at once will cause the temperature to plummet, meaning the coating absorbs oil instead of crisping up. Stick to one onion per batch.
• Wrong temperature: If the oil is too cool, the onion will be greasy and pale. If it’s too hot, the outside will burn before the inside is cooked. Use a kitchen thermometer to keep it steady at 190°C (375°F). The colour change from pale gold to deep golden brown is your visual cue.
• Skipping the rest time: I know it’s tempting to tear into it straight away, but that rest is the secret to a crunchy exterior. It allows the moisture inside to redistribute and the steam to escape, preventing a soggy mess. Patience pays off.

Delicious Variations to Try

• Spicy Version: Add an extra teaspoon of cayenne pepper and a teaspoon of chipotle chilli flakes to the seasoned flour. For the sauce, stir in a tablespoon of finely chopped jalapeño for a fresh, fiery kick.
• Vegetarian/Vegan Option: The recipe is already vegetarian. For a vegan version, use a plant-based milk (unsweetened almond or oat milk works well) and a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water). The coating and sauce are easily made vegan by using vegan mayonnaise.
• Different Protein: While the classic is all about the onion, you can serve it alongside a simple grilled chicken breast or a pan-seared steak. For a lighter meal, pair it with a Light Zucchini Noodles Dish for a wonderful contrast in textures.

What to Serve With Copycat Outback Steakhouse Bloomin’ Onion

• A crisp green salad with a sharp vinaigrette to cut through the richness.
• A bowl of Creamy Mashed Potatoes Side for a truly indulgent comfort-food spread.
• Grilled or roasted vegetables, such as asparagus or bell peppers.
• A cold, fizzy drink or a tall glass of iced tea.

Still hungry for ideas? You might also love Outback Steakhouse Blooming Onion Copycat from our sister kitchens.

Frequently Asked Questions

Copycat Outback Steakhouse Bloomin' Onion

A crispy, golden deep-fried onion that's cut to resemble a flower, served with a creamy, tangy dipping sauce. This copycat version recreates the iconic appetizer from Outback Steakhouse.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 30 minutes mins

Total Time 45 minutes mins

Servings: 4 servings

Course: Main Course

Cuisine: American

Calories: 350

Ingredients Method Notes

Ingredients

  

• 1 large sweet onion such as Vidalia or a Spanish onion, about 350g
• 500 ml whole milk
• 1 large egg
• 200 g plain flour
• 2 teaspoons paprika
• 1 teaspoon cayenne pepper
• 1 teaspoon garlic powder
• 1 teaspoon dried oregano
• 1 teaspoon fine sea salt
• ½ teaspoon freshly ground black pepper
• Vegetable oil for deep frying (about 1.5 litres)

For the dipping sauce: 200 ml mayonnaise

• 2 tablespoons tomato ketchup
• 1 tablespoon creamed horseradish
• 1 teaspoon smoked paprika
• ¼ teaspoon garlic powder

Method

 

1. Prepare the onion: Peel the onion, leaving the root end completely intact. Place it root-side down on a cutting board. Using a sharp knife, make a cut from the top down to about 1.5 cm from the root. Repeat this cut all around the onion, creating 12–16 even wedges. Gently use your fingers to separate the outer petals. You should hear a slight squeak as they loosen.
2. Soak and season the milk: In a large bowl, whisk together the milk and egg until well combined. Submerge the cut onion completely. You’ll see the petals open slightly in the liquid. Cover and refrigerate for at least 30 minutes. This step makes the petals pliable and helps the coating stick.
3. Make the seasoned flour: In a separate large bowl, whisk together the plain flour, paprika, cayenne pepper, garlic powder, oregano, salt, and black pepper. The mixture should smell warm and slightly spicy, with a deep red hue from the paprika.
4. Coat the onion: Remove the onion from the milk mixture, letting any excess drip off. Place it cut-side down into the seasoned flour. Use a spoon to generously sprinkle flour between every petal. Lift the onion, shake off the excess flour, and place it on a plate. The petals should look thickly coated, like a dusty blossom.
5. Heat the oil: Pour vegetable oil into a deep, heavy-bottomed pot or a deep fryer. Heat it to 190°C (375°F). You’ll know it’s ready when a pinch of flour sizzles immediately on the surface.
6. Fry the onion: Carefully lower the onion into the hot oil, cut-side down. Use a slotted spoon to gently baste the top petals with hot oil. Fry for 3–4 minutes, until the base is a deep, rich golden brown. You’ll hear a steady, satisfying sizzle.
7. Flip and finish: Using two large spoons or tongs, carefully flip the onion over. Fry for another 3–4 minutes, until the petals are evenly golden and crisp. The kitchen will smell wonderfully savoury and toasty.
8. Drain and serve: Lift the onion from the oil and place it on a plate lined with kitchen paper. Let it rest for 2 minutes. This allows the steam to escape and keeps the petals crunchy. Serve immediately with the dipping sauce.

Notes

For best results, use a sweet onion like Vidalia and ensure the root end stays intact while cutting. Refrigerating the onion in the milk mixture for at least 30 minutes helps the petals open and the coating adhere.

There’s a quiet satisfaction in pulling apart those golden petals, one by one, dipping them into that creamy, smoky sauce. It’s more than a snack; it’s a shared moment, a bit of theatre on a plate. My husband, who’s usually picky, asked for seconds, and my kids absolutely devour this every time I make it. I’d love to hear how you get on with yours – do share your pictures and thoughts in the comments below.