Pan-Seared Ribeye Steak with Caramelized Onion and Blue Cheese Butter

By AislePrompt Editorial · Published 2026-04-23 · Updated 2026-04-23

Perfectly seared ribeye steak topped with a savory caramelized onion and blue cheese butter sauce. This American-inspired beef recipe (keto), ready in about 25 minutes, pairs ribeye steaks, butter, yellow onion for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 400 calories and feeds 2, so it slots cleanly into a low-carb week and pairs well with cauliflower rice or roasted green vegetables. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 2 (1.5 inches thick, about 8 oz each) ribeye steaks
• 2 tbsp (divided) butter
• 1 small, thinly sliced yellow onion
• 1/4 cup crumbled blue cheese
• 1/2 tsp garlic powder
• 1/4 tsp salt
• 1/4 tsp black pepper

The cast-iron skillet we’d sear this in → Best Cast Iron Skillets for 2026: Top Picks + Buying Guide

Instructions

1. Step 1: Season both sides of 2 ribeye steaks (1.5 inches thick, about 8 oz each) with 1/4 tsp salt, 1/4 tsp black pepper, and 1/2 tsp garlic powder.
2. Step 2: Heat 1 tbsp butter in a cast-iron skillet over medium-high heat until shimmering. Add steaks and sear for 3-4 minutes per side for medium-rare.
3. Step 3: Remove steaks and set aside. Add remaining 1 tbsp butter and 1 small thinly sliced yellow onion to the skillet, cooking over medium heat for 10-12 minutes until deeply caramelized. Return steaks to skillet, spooning onion butter over them, then sprinkle with 1/4 cup crumbled blue cheese and let melt for 1 minute.