Copycat In-N-Out Protein Style Burger

Copycat In-N-Out Protein Style Burger (Lettuce-Wrapped!)

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By Millie Pham

Hey there!

If you’re craving that classic In-N-Out taste but wanna skip the bun, you’re in for a treat.

This Protein Style version is a low-carb dream—juicy burger, melty cheese, grilled onions, and that signature special sauce, all wrapped up in crisp, cool lettuce.

It’s family-friendly, super customizable, and seriously satisfying. We make these at home all the time when we want fast-food vibes without the drive-thru line.

🛒 What You’ll Need

  • 1 lb ground beef (80/20 for juicy burgers)
  • Salt and pepper
  • 4 slices American cheese
  • 1 large head of iceberg lettuce (keep leaves whole)
  • 1 large tomato, sliced
  • 1 small yellow onion, diced
  • 1 tbsp butter or oil
  • Pickles (optional, for serving)

For the special sauce:

  • ¼ cup mayo
  • 2 tbsp ketchup
  • 1 tbsp sweet pickle relish
  • 1 tsp white vinegar
  • Pinch of sugar
Copycat In-N-Out Protein Style Burger

👩‍🍳 Pro Tips

  1. Keep lettuce cold! It helps it stay super crisp and hold everything together better.
  2. Use parchment paper to wrap the burger—it’s what In-N-Out does and keeps things tidy.
  3. Smash those onions! Grilling diced onions until golden brings out all the sweetness.
  4. Cheese timing matters – lay it on the burger right after flipping so it melts just right.
  5. Let kids build their own – it’s fun, and they’ll be more excited to eat it.

🔧 Tools Needed

  • Cast iron skillet or nonstick pan
  • Spatula
  • Chef’s knife
  • Cutting board
  • Small bowls
  • Mixing spoon
  • Parchment paper squares (optional but helpful)

🔁 Substitutions & Variations

  • Turkey or chicken instead of beef for a leaner option
  • Vegan cheese & patty for plant-based eaters
  • Romaine leaves if you can’t find iceberg
  • Add bacon or avocado for extra flavor

⏱️ Make Ahead Tips

  • Mix the special sauce and prep toppings in advance (up to 2 days ahead).
  • Dice and caramelize onions ahead—just reheat when ready to use.

👩‍🍳 Step-by-Step Instructions

Step 1: Make the Special Sauce

Mix mayo, ketchup, sweet pickle relish, vinegar, and a pinch of sugar in a small bowl until smooth. Set aside.

Copycat In-N-Out Protein Style Burger

Step 2: Grill the Onions

In a skillet over medium heat, melt butter. Add diced onions and cook until golden brown and soft (about 8–10 mins). Stir often.

Copycat In-N-Out Protein Style Burger

Step 3: Shape and Season the Patties

Divide ground beef into 4 equal portions, shape into thin patties slightly larger than your palm. Season both sides with salt and pepper.

Copycat In-N-Out Protein Style Burger

Step 4: Cook the Patties

Heat skillet over medium-high. Cook patties 2-3 minutes per side. After flipping, place a slice of American cheese on each and let it melt.

Copycat In-N-Out Protein Style Burger

Step 5: Prep the Lettuce Wrap

Lay out 2–3 iceberg lettuce leaves overlapping slightly to form a wrap. Add a slice of tomato and a spoonful of special sauce.

Copycat In-N-Out Protein Style Burger

Step 6: Assemble the Burger

Place the cheesy burger patty on the lettuce wrap, top with grilled onions and pickles if using. Fold the lettuce up and around the burger like a wrap.

Copycat In-N-Out Protein Style Burger

🥡 Leftovers & Storage

  • Store cooked patties in the fridge up to 3 days. Reheat gently in a skillet.
  • Keep lettuce and toppings separate to avoid sogginess.
  • Sauce can last up to a week in the fridge.

💬 That’s a Wrap (Literally!)

You just made your own In-N-Out Protein Style Burger at home—and I bet it’s even better than the drive-thru version. I’d love to hear how yours turned out! Leave a comment below with your twist, your questions, or if your kids gave it two thumbs up. Let’s keep cookin’ together! 🍔💚

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