Gorgonzola Caramelized Onion Steak Bites Skillet Step-by-step instructions

Before you start

Before starting, set out all your ingredients. Cut the New York strip steak into 1-inch cubes and pat them dry with paper towels. Season with kosher salt and chopped rosemary, and let sit at room temperature while you caramelize the onions (no more than 30 minutes).

Slice the onions thinly and crumble the Gorgonzola. Have your balsamic vinegar and olive oil measured and ready. Preheat a large cast-iron skillet over medium heat for the onions.

Instructions

Caramelize and Season

1. 1Prep and caramelize onions
   Heat 1 tablespoon olive oil in a large cast-iron skillet over medium heat. Add the sliced onions and cook, stirring occasionally, until deeply golden and jammy, about 15 minutes. Stir in the aged balsamic vinegar and cook for 1 minute more. Transfer the onions to a bowl and wipe the skillet clean.
   Look for Onions are soft, golden brown, and smell sweet and tangy.
   Tip Don't rush the onions – low and slow gives the best caramelization.
2. 2Season the steak
   Pat the steak cubes dry with paper towels. Season generously with kosher salt and the chopped rosemary, tossing to coat evenly. Let sit at room temperature for up to 30 minutes while the onions caramelize.
   Look for Steak cubes are evenly coated with salt and rosemary.
   Tip Patting dry ensures a good sear.

At the end of this phase, the onions should be soft, golden brown, and sweet, with a slight tang from the balsamic vinegar. The steak cubes are seasoned and ready to sear.

The kitchen fills with the aroma of caramelizing onions and fresh rosemary. If the onions are browning too quickly, lower the heat and add a splash of water to slow them down.

Sear and Melt

3. 3Sear the steak
   Heat the remaining 1 tablespoon olive oil in the same skillet over high heat until shimmering. Add the steak cubes in a single layer (work in batches if needed) and sear without moving for 2 minutes. Toss and continue cooking for another 1–2 minutes until browned on all sides but still tender inside. Let it rest for 3 minutes before slicing.
   Look for Steak is deeply browned on the outside and springy to the touch.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Don't overcrowd the pan – leave space between cubes for a proper sear.
4. 4Fold in the onions
   Reduce the heat to low and return the caramelized onions to the skillet, folding them gently into the steak bites so they coat the meat. Cook for 1 minute to warm the onions through.
   Look for Onions are glossy and mixed through the steak.
   Tip Keep the heat low so the steak doesn't overcook.
5. 5Melt the Gorgonzola
   Sprinkle the crumbled Gorgonzola Dolce evenly over the steak and onions. Cover the skillet with a lid or foil and let sit off the heat for 2–3 minutes, until the cheese is melted and creamy.
   Look for Cheese is melted and clinging to the steak and onions.
   Tip The residual heat melts the cheese without overcooking the steak.

The steak is seared until deeply browned on all sides, the onions are folded in, and the Gorgonzola is melted into a creamy coating. The skillet is sizzling and fragrant with beef and cheese. The steak should be springy to the touch and the cheese fully melted. If the cheese isn't melting, cover the skillet for an extra minute.

Rest and Serve

6. 6Rest and serve
   Let the steak bites rest for at least 3 minutes before serving. Spoon the cheesy onions and any pan juices over the top and serve hot.
   Look for Steak is juicy and the cheese is gooey.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Resting allows the juices to redistribute.

The steak bites have rested for at least 3 minutes, allowing the juices to settle. The cheese is gooey and the onions are glossy. The dish looks like a rustic steakhouse masterpiece. Serve immediately, spooning any pan juices over the top, and enjoy the rich, savory, sweet flavors.

Common mistakes

One common mistake is not patting the steak dry before searing – this prevents browning. Another is overcrowding the pan, which lowers the temperature and steams the meat instead of searing it. For the onions, be patient: if you rush them over high heat, they'll burn before they caramelize.

Also, don't add the balsamic vinegar too early – it can burn and turn bitter. Finally, don't skip the resting period after cooking; cutting into the steak too soon will release the juices and make it dry.

How to tell it’s done

The steak bites are done when they reach an internal temperature of 145°F (63°C) for medium-rare, or up to 160°F (71°C) for medium. The onions should be deeply golden and jammy, the balsamic should have reduced into a glossy coating, and the Gorgonzola should be completely melted and creamy.

The steak should be browned on the outside and tender when pierced with a fork. After cooking, let the steak rest for at least 3 minutes to allow the juices to redistribute.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest