How to Cook Ribeye Cap Steak Costco Style

The Kirkland Signature Ribeye Cap Steak is the spinalis dorsi muscle. That outer rim of marbled beef sitting on top of a regular ribeye. Costco sells it rolled, tied, and sliced into pinwheel steaks.

This cut delivers tenderloin-level tenderness with full ribeye flavor. Most Costco locations stock it in the meat department near other prime beef options, though availability varies by store.

I cover four cooking methods below. Cast iron takes about 10 minutes. Grilling runs 8-10 minutes. Reverse sear needs 35-45 minutes total. Sous vide requires 1.5-2 hours plus searing time.

Product Details

Product: Kirkland Signature Beef Ribeye Cap Steak Boneless USDA Prime

Type: Fresh, not frozen. Blade tenderized.

Package Size: Sold by the pound (typically 1-2 lbs per package)

Price: $28.49/lb at Costco (Updated January 2025). American Wagyu version runs $34.99/lb.

Storage: Refrigerate at 40°F or below. Use within 3-5 days.

Calories per Serving: 210 calories per 3 oz cooked (lean only, fat trimmed)

Main Ingredients: USDA Prime Beef (spinalis dorsi muscle)

Nutrition (3 oz): 21g protein, 13g fat, 0g carbs, 70mg sodium

Item Number: 3075012

Cooking Methods Comparison

Recommended Method: Cast iron skillet for the best balance of speed and quality crust formation.

Method 1: Cast Iron Skillet (Recommended)

Cast iron delivers steady high heat for the Maillard reaction you want on this cut. The fat marbling renders beautifully against hot metal. Total time runs 8-12 minutes depending on thickness and desired doneness.

Step 1: How Do You Prepare the Ribeye Cap?

Pull the steak from the refrigerator 30-40 minutes before cooking. Room temperature meat cooks more evenly. Pat completely dry with paper towels.

Instructions:

1. Remove packaging and pat steak dry on all sides
2. Let rest on counter until internal temp reaches about 65-70°F
3. Season generously with kosher salt and black pepper just before cooking

Equipment: Paper towels, cutting board, instant-read meat thermometer

Step 2: What Temperature and Time Do You Use?

High heat creates the crust. Medium-high maintains it without burning. Sear 3-4 minutes per side for a 1-inch thick steak.

Instructions:

1. Preheat cast iron skillet over medium-high heat for 5 minutes
2. Add 1 tablespoon avocado oil when pan begins to smoke lightly
3. Place steak in pan. Do not move for 3-4 minutes.

Temperature: Medium-high heat (around 450°F pan surface)

Time: 3-4 minutes first side, 3-4 minutes second side

Step 3: When Do You Flip and Baste?

One flip is usually enough. Add butter and aromatics after the flip for basting.

Instructions:

1. Flip steak when first side shows a dark golden-brown crust
2. Add 2 tablespoons butter, 2 crushed garlic cloves, and fresh thyme to the pan
3. Tilt pan and spoon melted butter over steak continuously for 2-3 minutes

Checkpoint: At 3-4 minute mark, check underside for even browning before flip

Step 4: How Do You Know When It’s Done?

Use a meat thermometer. Visual cues help but temperature confirms doneness. Pull 5 degrees below target since carryover cooking continues off heat.

Instructions:

1. Insert instant-read thermometer into thickest part of the steak
2. Remove at 125°F for medium-rare (rises to 130-135°F during rest)
3. Rest 5-10 minutes before slicing against the grain

Target Temperature: 130-135°F for medium-rare, 140-145°F for medium

Visual Indicator: Deep brown crust with visible butter browning, slight resistance when pressed

Method 2: Grill

Grilling adds smoke flavor that pairs well with the ribeye cap’s rich fat content. The high marbling handles direct heat without drying out. Takes 6-10 minutes total over hot coals or gas flames.

Step 1: How Do You Prepare for Grilling?

Same prep as cast iron. Room temperature steak, dry surface, generous seasoning.

Instructions:

1. Remove from fridge 30 minutes before cooking
2. Pat dry and season with salt and pepper
3. Optional: light coating of oil to prevent sticking

Equipment: Grill (gas or charcoal), long tongs, meat thermometer, grill brush

Step 2: What Temperature and Time Do You Use?

Direct high heat creates the char. Ribeye cap’s fat prevents it from drying out at these temperatures.

Instructions:

1. Preheat grill to 550-600°F with lid closed for 10-15 minutes
2. Clean grates with grill brush and oil lightly
3. Place steaks over direct heat

Temperature: 550-600°F grill surface

Time: 3-4 minutes per side for medium-rare

Step 3: When Do You Flip?

Watch for grill marks and rendered fat. Flip once for even cooking.

Instructions:

1. Cook first side 3-4 minutes until grill marks appear
2. Rotate 90 degrees for crosshatch marks if desired (optional)
3. Flip and cook second side 3-4 minutes

Checkpoint: At 3-minute mark, check underside for char development

Step 4: How Do You Know When It’s Done?

Temperature check remains the most reliable method. The fat cap should be nicely rendered.

Instructions:

1. Check internal temp at thickest point
2. Remove at 125°F for medium-rare
3. Rest 5-10 minutes, then top with compound butter if desired

Target Temperature: 130-135°F for medium-rare after resting

Visual Indicator: Charred grill marks, fat visibly rendered, juices pooling on surface

Method 3: Reverse Sear

Reverse sear works best for thicker ribeye caps (1.5 inches or more). You cook low in the oven first, then sear at the end. This produces edge-to-edge even doneness with a perfect crust. Total time runs 35-45 minutes.

Step 1: How Do You Prepare for Reverse Sear?

Season ahead if possible. The oven’s low heat dries the surface, which helps the final sear.

Instructions:

1. Season steak with salt and pepper
2. Place on wire rack set inside a rimmed baking sheet
3. Optionally refrigerate uncovered for 1-4 hours (dries surface further)

Equipment: Oven, wire rack, baking sheet, cast iron skillet, meat thermometer

Step 2: What Temperature and Time Do You Use in the Oven?

Low oven temperature brings the steak up slowly. You want about 110-115°F before searing.

Instructions:

1. Preheat oven to 250-275°F
2. Place steak on rack in center of oven
3. Cook until internal temp reaches 110-115°F (about 20-30 minutes for 1.5-inch steak)

Temperature: 250-275°F oven

Time: 20-30 minutes until internal temp reaches 110-115°F

Step 3: How Do You Finish with the Sear?

Ripping hot pan for the final sear. This creates the crust without overcooking the interior.

Instructions:

1. Preheat cast iron skillet over high heat for 5 minutes while steak finishes in oven
2. Add 1 tablespoon high smoke point oil (avocado or grapeseed)
3. Sear 1-2 minutes per side until deep brown crust forms

Checkpoint: Steak should sizzle aggressively when it hits the pan

Step 4: How Do You Know When It’s Done?

Searing raises internal temp about 10-15 degrees. Pull when you hit target.

Instructions:

1. Check internal temperature after searing both sides
2. Target 130-135°F for medium-rare
3. Rest 5-10 minutes before slicing

Target Temperature: 130-135°F for medium-rare

Visual Indicator: Even pink from edge to edge with thin brown crust

Method 4: Sous Vide

Sous vide makes overcooking nearly impossible. You set the exact temperature you want and the steak can’t exceed it. The trade-off is time. Takes 1.5-2 hours in the water bath plus searing.

Step 1: How Do You Prepare for Sous Vide?

Vacuum sealing removes air for even heat transfer. Season before bagging.

Instructions:

1. Season steak with salt and pepper
2. Place in vacuum bag with optional herbs and garlic
3. Vacuum seal or use water displacement method with zip-lock bags

Equipment: Immersion circulator, container, vacuum bags or zip-lock bags, cast iron skillet

Step 2: What Temperature and Time Do You Use?

Set your circulator to final desired doneness. Ribeye cap benefits from slightly higher temps to render fat.

Instructions:

1. Fill container with water and set immersion circulator to 132°F for medium-rare
2. Wait for water to reach temperature
3. Submerge sealed steak and cook 1.5-2 hours

Temperature: 132°F for medium-rare, 140°F for medium

Time: 1.5-2 hours (do not exceed 4 hours)

Step 3: How Do You Finish with the Sear?

Dry the steak thoroughly. Moisture is the enemy of a good sear.

Instructions:

1. Remove steak from bag and pat completely dry with paper towels
2. Heat cast iron skillet over high heat until smoking
3. Sear 1-2 minutes per side in oil or butter

Checkpoint: Surface should be bone dry before hitting the pan

Step 4: How Do You Know When It’s Done?

It’s already done from the sous vide. Searing is just for texture and color.

Instructions:

1. Sear until dark golden crust forms
2. Internal temp should match or be slightly above your sous vide setting
3. Rest 2-3 minutes (less rest needed with sous vide)

Target Temperature: 130-135°F (should already be there from water bath)

Visual Indicator: Perfect edge-to-edge pink with thin crispy crust

Safety and Quality Indicators

Food Safety

• Internal Temperature: USDA recommends 145°F minimum for whole cuts of beef. Many prefer 130-135°F for medium-rare.
• Blade Tenderized: Costco’s ribeye caps are blade tenderized. Some cooks prefer higher temps for tenderized meat.
• Thawing: If frozen, thaw in refrigerator 24 hours before cooking. Never thaw at room temperature.

Quality Indicators (Done Properly)

• Color: Deep brown crust exterior, pink to light red interior for medium-rare
• Texture: Tender enough to cut with a fork, slight resistance when pressed
• Temperature: Hot throughout, juices run clear to slightly pink
• Appearance: Fat visibly rendered, glistening surface from butter basting

Signs of Overcooking

• Gray color throughout interior (no pink)
• Tough, chewy texture
• Dry appearance with no visible juices
• Shrunken size (meat contracts significantly when overcooked)

Serving Suggestions

Portion Size: 4-6 oz per person (1 pound serves 2-3 people)

Serving Ideas

• Slice against the grain and fan across plate with compound butter melting on top
• Serve whole on a board with finishing salt like Maldon flakes
• Cut into strips for steak tacos with pickled onions and cilantro

Pairing Recommendations

• Mashed potatoes, roasted asparagus, or sauteed mushrooms
• Bold red wine like Cabernet Sauvignon or Malbec
• Simple salad with peppery arugula to cut the richness

For a full meal, try serving this alongside Costco mashed potatoes or Costco garlic bread.

Storage and Reheating

Leftover Storage

• Refrigerate within 2 hours of cooking
• Store in airtight container or wrapped tightly
• Consume within 3-4 days

Reheating Instructions

• Oven: 250°F for 10-15 minutes until warmed through
• Stovetop: 2-3 minutes per side in butter over medium heat
• Microwave: Not recommended (causes uneven heating and texture changes)
• Target Temperature: 110-120°F internal (don’t go higher or you’ll overcook)

Troubleshooting Common Issues

Issue: No crust forming on the steak

Cause: Pan not hot enough or steak surface was wet

Solution: Preheat cast iron 5+ minutes. Pat steak completely dry before cooking. Wait for oil to shimmer before adding meat.

Issue: Gray band under the crust (overcooked edges)

Cause: Cooking too long at high heat without rest period

Solution: Use reverse sear method for thick cuts. Pull steak earlier and let carryover cooking finish it.

Issue: Steak is tough or chewy

Cause: Overcooked beyond medium, or sliced with the grain instead of against it

Solution: Use meat thermometer to hit target temp. Always slice perpendicular to muscle fibers.

Issue: Butter burning in the pan

Cause: Added butter too early when pan was too hot

Solution: Sear in high smoke point oil first. Add butter only in the last 2 minutes of cooking after reducing heat slightly.

Product Variations and Related Items

Similar Costco Products

• USDA Prime Ribeye Steak – Full ribeye with cap attached. $15.99/lb. Lower price but includes the eye section.
• American Wagyu Ribeye Cap – Higher marbling grade. $34.99/lb. Even more tender and rich.
• Whole Prime Rib Roast – You can remove the cap yourself before roasting. More economical for large gatherings.

Cooking Time Adjustments

• Thinner steaks (under 1 inch): Reduce sear time to 2-3 minutes per side
• Thicker steaks (over 1.5 inches): Use reverse sear or sous vide for even cooking
• Frozen steaks: Add 50% more time for sous vide. Not recommended to cook from frozen with other methods.

Looking for more Costco cooking guides? Check out how to prepare Costco prime beef, Costco filet mignon, or Costco tri tip for your next steak night.

FAQ on How To Cook Ribeye Cap Steak Costco

What is ribeye cap steak and why is it special?

The ribeye cap is the spinalis dorsi muscle. It sits on top of the ribeye eye.

This cut combines tenderloin-level tenderness with full ribeye flavor. The high marbling fat makes it one of the most sought-after beef cuts available.

How much does Costco ribeye cap steak cost?

Kirkland Signature USDA Prime ribeye cap runs $28.49 per pound. The American Wagyu version costs $34.99 per pound.

Prices vary by location. Check your local Costco meat department for current pricing.

What is the best way to cook ribeye cap steak?

A cast iron skillet delivers the best results for most home cooks. High heat creates perfect crust formation through the Maillard reaction.

Sear 3-4 minutes per side. Finish with butter basting for restaurant-quality steak.

What internal temperature should ribeye cap reach?

For medium rare, pull at 125°F. It rises to 130-135°F during resting time.

Medium needs 135-140°F final temp. Always use an instant-read meat thermometer to check doneness accurately.

Should I season ribeye cap steak before cooking?

Yes. Use kosher salt and freshly ground black pepper generously on all sides.

The cut’s natural flavor shines with simple seasoning. No marinade needed. The beef fat renders and provides plenty of richness.

How long should ribeye cap rest before slicing?

Rest 5-10 minutes after cooking. This lets juices redistribute throughout the meat.

Skip resting and you lose moisture. Slice against the grain for the most tender bite.

Can I grill ribeye cap steak instead of pan searing?

Absolutely. Preheat your grill to 550-600°F for direct high heat cooking.

Grill 3-4 minutes per side for medium rare. The charcoal grill adds smoky flavor that pairs well with the rich marbling.

What is the reverse sear method for ribeye cap?

Start in a 250°F oven until internal temp hits 110-115°F. Then sear in a ripping hot skillet.

This reverse sear method produces edge-to-edge even doneness. Best for thicker cuts over 1.5 inches.

How do I know when ribeye cap steak is done?

Use a meat thermometer inserted into the thickest part. Look for 125°F for medium rare.

Visual indicators include a deep brown crust and juices pooling on the surface. The steak should feel slightly firm when pressed.

Can I cook ribeye cap steak sous vide?

Yes. Set your immersion circulator to 132°F and cook for 1.5-2 hours.

Pat dry after the water bath. Finish with a 1-2 minute sear per side in a hot cast iron for perfect crust.

Conclusion

Now you know how to cook ribeye cap steak Costco using four different methods. Each technique delivers juicy, tender results when you hit the right steak doneness.

The spinalis cut rewards simple preparation. Kosher salt, black pepper, and high heat do most of the work.

Use a meat thermometer every time. Pull at 125°F for medium rare and let it rest before slicing against the grain.

Pair with bold red wine and your favorite sides. This premium cut turns any weeknight into something worth remembering.