Beginner Pan-Seared Steak with Pan Onions (No Cast Iron Needed)
A beginner-friendly steak dinner built for a regular skillet: a hard sear for a crisp crust, then a quick butter-basted finish. While the steak rests, sliced onions go into the same pan to soak up the browned bits and turn sweet and jammy, then get loosened with a splash of broth or water for an easy pan sauce. Rich, savory, and simple enough for a weeknight, with restaurant vibes and minimal gear.
- weeknight
- beginner
- one-pan
Ingredients
- Steak
- •2 steaks, about 225 g / 8 oz each (ribeye, strip, or sirloin), 2.5–3.5 cm / 1–1½ in thick
- •1 tbsp neutral oil (canola, grapeseed, or avocado)
- •1 tbsp unsalted butter
- •1 garlic clove, smashed (optional)
- •2 thyme sprigs or 1 tsp dried thyme (optional)
- •1¼ tsp kosher salt, plus more to taste
- •½ tsp black pepper, plus more to taste
- Pan onions & quick sauce
- •1 large yellow onion, thinly sliced (about 2–3 cups)
- •½ tsp kosher salt
- •1 tbsp unsalted butter (or 1 tbsp oil if you prefer)
- •½ cup beef broth or water
- •1 tsp Dijon mustard (optional)
- •1 tbsp chopped parsley (optional)
Instructions
Overview
You’ll sear the steaks, rest them, then cook the onions in the same pan to capture all the flavor.
Cook
Dry and season the steaks. Pat steaks very dry with paper towels. Season all over with 1¼ tsp kosher salt and ½ tsp black pepper. Let sit at room temp for 15–20 minutes while you prep the onion.
Preheat the pan. Set a heavy stainless-steel or nonstick skillet over medium-high heat for 2–3 minutes. The pan is ready when a drop of water flicked in sizzles and skitters.
Sear the first side. Add 1 tbsp neutral oil and swirl. Lay in the steaks and don’t move them for 2–4 minutes. You’re looking for a deep brown crust; you should hear a steady, loud sizzle.
Sear the second side + edges. Flip and sear 2–4 minutes more. If the steaks have a fat cap, stand them up and render the edge for 30–60 seconds.
Butter-baste to finish. Reduce heat to medium. Add 1 tbsp butter (plus garlic/thyme if using). Tilt the pan and spoon the foaming butter over the steaks for 30–60 seconds, until the aroma is nutty and the surface looks lacquered.
Check doneness, then rest. Pull steaks when they’re 5°F / 3°C below your target (carryover heat will finish). As a guide: medium-rare 125–130°F (52–54°C) pull; medium 135–140°F (57–60°C) pull. Rest on a plate 5–10 minutes; juices should redistribute and the surface should look moist, not wet.
Cook the onions in the same pan. Pour off excess fat if needed, leaving about 1 tbsp in the pan. Add sliced onion and ½ tsp salt. Cook over medium heat 6–10 minutes, stirring and scraping, until softened with browned edges and sweet smell.
Loosen into a quick sauce. Add ½ cup broth or water and scrape up the browned bits. Simmer 1–2 minutes until slightly syrupy. Stir in 1 tbsp butter (or keep it lean), and 1 tsp Dijon if using. Taste and adjust salt/pepper.
Serve. Slice steak against the grain, spoon onions and sauce over top, and finish with parsley if you like.
If the pan smokes: lower the heat a notch; you want aggressive sizzling, not a burnt oil smell.
If the crust is pale: the steak was damp or the pan wasn’t hot enough—dry thoroughly and preheat longer next time.