How to Cook Costco Italian Sausage

Kirkland Signature Mild Italian Sausage is a fresh pork sausage sold in the refrigerated meat section at Costco.

The 56 oz package contains 14 plump links seasoned with fennel, black pepper, and traditional Italian herbs.

This is a raw sausage product. It needs to be fully cooked before eating.

Most people cook these for quick weeknight dinners, sausage and peppers, pasta dishes, or sandwiches on hoagie rolls.

The bulk family-size package feeds 7-14 people depending on serving size.

This guide covers four cooking methods: air fryer, stovetop, oven, and grill. Cook times range from 10-25 minutes depending on your method and equipment.

Product Details

Product: Kirkland Signature Mild Italian Sausage

Type: Fresh, raw pork sausage (not pre-cooked)

Package Size: 56 oz / 3.5 lbs (14 links)

Price: $10.49-$10.99 at Costco (prices vary by location)

Storage: Keep refrigerated at 40°F or below

Calories per Serving: 250 (1 link, 112g)

Protein: 18g per link

Main Ingredients: Pork, water, salt, sugar, vinegar powder, spices (fennel, black pepper), natural flavors, paprika

Item Number: 1735359

Notes: No MSG, no preservatives, no artificial ingredients, gluten-free

Cooking Methods Comparison

Recommended Method: Air fryer for crispiest skin and fastest cleanup. Stovetop for traditional sausage and peppers.

Method 1: Air Fryer (Recommended)

The air fryer produces crispy-skinned sausages in about 12 minutes with almost no mess.

You can cook 4-6 links at once depending on basket size.

The hot circulating air renders fat while keeping the inside juicy.

Step 1: How Do You Prepare the Sausage?

Remove the links from the package and pat them dry with a paper towel.

Instructions:

1. Take sausages out of refrigerator
2. Let sit at room temperature for 10 minutes (optional but helps even cooking)
3. Do not poke holes in the casing

Equipment: Air fryer basket, tongs, meat thermometer

Step 2: What Temperature and Time Do You Use?

Preheat your air fryer to 360°F for 3-5 minutes before adding the sausages.

Instructions:

1. Set air fryer to 360°F
2. Place links in a single layer with space between them
3. Cook for 10-12 minutes total

Temperature: 360°F (for crispier skin, use 400°F for 8-10 minutes)

Time: 10-12 minutes at 360°F, or 8-10 minutes at 400°F

Step 3: When Do You Flip the Sausage?

Flip the sausages at the halfway mark to brown both sides evenly.

Instructions:

1. At 5-6 minutes, open the basket
2. Use tongs to flip each link
3. Close and continue cooking

Checkpoint: At 5-6 minute mark

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

The sausage is safe to eat when internal temperature reaches 160°F.

Instructions:

1. Insert meat thermometer into the thickest part of the link
2. Check that it reads at least 160°F
3. Rest for 3-5 minutes before serving

Target Temperature: 160°F minimum

Visual Indicator: Golden brown exterior, no pink in center when sliced

Method 2: Stovetop (Skillet)

Pan frying with a water simmer produces perfectly cooked sausages without burning the outside.

This two-step method browns the exterior first, then finishes cooking with steam.

Great for making sausage with bell peppers and onions in one pan.

Step 1: How Do You Prepare the Skillet?

Use a cast iron or non-stick skillet large enough to hold your sausages without crowding.

Instructions:

1. Add 1 tablespoon olive oil or butter to skillet
2. Heat over medium-high heat until shimmering
3. Have a tight-fitting lid ready

Equipment: Large skillet with lid, tongs, meat thermometer

Step 2: What Temperature and Time Do You Use?

Brown the sausages first, then add water and cover to finish cooking through.

Instructions:

1. Place links in hot skillet
2. Brown 2-3 minutes per side over medium-high heat
3. Add 1/2 cup water to skillet
4. Cover immediately and reduce heat to medium-low
5. Simmer 10-12 minutes

Temperature: Medium-high for browning, medium-low for simmering

Time: 12-15 minutes total

Step 3: When Do You Check the Sausage?

After simmering, remove the lid and let remaining water evaporate.

Instructions:

1. After 10 minutes of simmering, remove lid
2. Let water evaporate (about 2-3 minutes)
3. Turn sausages to brown any pale spots

Checkpoint: At 10 minute mark

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

Check internal temperature and look for golden brown color all around.

Instructions:

1. Insert thermometer into center of thickest link
2. Confirm temperature reads 160°F
3. Rest 3 minutes before slicing

Target Temperature: 160°F minimum

Visual Indicator: Deep golden brown exterior, firm when pressed

Method 3: Oven Baking

Baking is the most hands-off method.

Works great for cooking the entire 14-link package at once for meal prep or feeding a crowd.

The consistent oven heat cooks sausages evenly without babysitting.

Step 1: How Do You Prepare the Baking Sheet?

Line a rimmed sheet pan with foil or parchment for easy cleanup.

Instructions:

1. Preheat oven to 400°F
2. Line baking sheet with aluminum foil or parchment paper
3. Arrange sausages in a single layer with 1 inch of space between each

Equipment: Rimmed baking sheet, foil or parchment, tongs, meat thermometer

Step 2: What Temperature and Time Do You Use?

Bake at 400°F for even browning and a crisp exterior.

Instructions:

1. Place sheet pan in center of preheated oven
2. Bake for 20-25 minutes total
3. Optional: lightly spray links with olive oil for extra browning

Temperature: 400°F

Time: 20-25 minutes

Step 3: When Do You Flip the Sausage?

Flip once at the halfway point for even color on all sides.

Instructions:

1. At 10-12 minutes, open oven
2. Use tongs to flip each link
3. Return to oven and continue baking

Checkpoint: At 10-12 minute mark

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

Sausages should be deeply browned with an internal temperature of 160°F.

Instructions:

1. Check internal temperature with meat thermometer
2. For extra crispy skin, broil on low for 1-2 minutes (watch closely)
3. Rest 3-5 minutes before serving

Target Temperature: 160°F minimum

Visual Indicator: Golden brown all over, sizzling fat

Method 4: Grill

Grilling adds smoky flavor and char marks you cannot get from other methods.

The key is using indirect heat first, then finishing over direct flame.

This prevents the casings from bursting before the inside cooks through.

Step 1: How Do You Set Up the Grill?

Create two heat zones: one direct, one indirect.

Instructions:

1. For gas grill: light one side to medium-high, leave other side off
2. For charcoal: pile coals on one side only
3. Preheat with lid closed for 10-15 minutes
4. Target grill temperature: 375-425°F

Equipment: Grill, tongs, meat thermometer, grill brush

Step 2: What Temperature and Time Do You Use?

Start over indirect heat to cook through, then char over direct heat.

Instructions:

1. Place sausages on indirect heat side
2. Close lid and cook 8-10 minutes
3. Flip and cook another 8-10 minutes
4. Move to direct heat for final 2-3 minutes per side to char

Temperature: 375-425°F grill surface

Time: 15-20 minutes total

Step 3: When Do You Turn the Sausage?

Turn every 5 minutes or so for even cooking and grill marks.

Instructions:

1. Use tongs to turn (never pierce with a fork)
2. Rotate sausages so all sides get heat exposure
3. Watch for flare-ups when over direct heat

Checkpoint: Every 5 minutes

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

Internal temperature must reach 160°F before removing from grill.

Instructions:

1. Insert thermometer into end of sausage (not the side)
2. Confirm 160°F reading
3. Rest 3 minutes before serving

Target Temperature: 160°F minimum

Visual Indicator: Charred grill marks, plump appearance, firm texture

Safety and Quality Indicators

Food Safety

• Internal Temperature: 160°F minimum for pork sausage (USDA requirement)
• Steam Check: Product should steam when cut open
• Thawing: If frozen, thaw in refrigerator overnight before cooking. Can cook from frozen with added time.

Quality Indicators (Done Properly)

• Color: Deep golden brown exterior
• Texture: Firm when pressed, snappy casing
• Temperature: Hot throughout, 160°F internal
• Appearance: Plump, juices run clear when sliced

Signs of Overcooking

• Shriveled or wrinkled casing
• Dry, crumbly interior
• Split or burst casings
• Internal temp above 180°F

Serving Suggestions

Portion Size: 1-2 links per serving (14 servings per package at 1 link each)

Serving Ideas

• On a hoagie roll with sauteed bell peppers and onions
• Sliced over pasta with marinara sauce and parmesan
• Alongside Costco mashed potatoes and roasted vegetables
• Chopped into a sheet pan dinner with potatoes and peppers

Pairing Recommendations

• Side dishes: roasted broccoli, garlic bread, Caesar salad
• Starches: penne pasta, Costco jasmine rice, crusty Italian bread
• Sauces: marinara, brown mustard, giardiniera relish

Storage and Reheating

Leftover Storage

• Refrigerate cooked sausage within 2 hours
• Store in airtight container
• Consume within 4-5 days
• Can freeze cooked sausage for up to 3 months

Reheating Instructions

• Microwave: 1-2 minutes at medium power, covered
• Stovetop: 3-4 minutes in skillet over medium heat
• Air Fryer: 2-3 minutes at 350°F
• Target Temperature: 165°F when reheating

Troubleshooting Common Issues

Issue: Sausage bursts or splits while cooking

Cause: Heat too high, casings dry out and crack under pressure

Solution: Lower temperature. Use water-simmer method on stovetop. Start with indirect heat when grilling. Do not poke holes in casing.

Issue: Cooked outside but raw inside

Cause: Temperature too high, cooking too fast

Solution: Reduce heat. Use a meat thermometer. Add water and cover to steam through. Let sausage come to room temp before cooking.

Issue: Dry or tough texture

Cause: Overcooked beyond 180°F internal temperature

Solution: Remove from heat at 160°F. Let residual heat finish cooking during rest time. Do not pierce casing while cooking.

Issue: Air fryer smoking

Cause: Fat dripping onto heating element

Solution: Add 2 tablespoons water to bottom of air fryer drawer. Place a piece of bread under basket to absorb grease. Clean air fryer more frequently.

Cooking From Frozen

You can cook Kirkland Italian sausage directly from frozen without thawing.

Time Adjustments:

• Air Fryer: Add 5-6 extra minutes (total 15-18 minutes)
• Oven: Add 15 extra minutes (total 35-40 minutes)
• Stovetop: Add 5-8 extra minutes to simmer time

Always verify internal temperature reaches 160°F before eating.

Product Variations and Related Items

Similar Costco Products

• Other Costco sausage varieties – different seasoning profiles
• Costco chicken sausage – lower fat option, cook to 165°F
• Costco breakfast sausage – smaller links, sweeter flavor
• Costco Teton Polish sausage – smoked, pre-cooked variety

Cooking Time Notes

Hot Italian sausage cooks the same as mild. Just different spice level.

Chicken or turkey Italian sausage requires 165°F internal temp and may cook slightly faster.

Which Method Should You Choose?

Choose Air Fryer when:

• You want the crispiest skin
• Cooking 2-6 links
• You have 15 minutes or less
• You want minimal cleanup

Choose Stovetop when:

• Making sausage and peppers
• You want more control over browning
• Adding to a sauce or one-pan meal
• No air fryer available

Choose Oven when:

• Cooking the entire 14-link package
• Meal prepping for the week
• You want hands-off cooking
• Feeding a crowd

Choose Grill when:

• You want smoky flavor
• Hosting a cookout
• Already grilling other items
• Summer weather

Time Comparison

Air Fryer (10-15 min) < Stovetop (12-15 min) < Grill (15-20 min) < Oven (20-25 min)

Texture Ranking

Air Fryer (crispiest skin) > Grill (charred, smoky) > Stovetop (golden, tender) > Oven (even, consistent)

FAQ on How To Cook Costco Italian Sausage

What temperature should Costco Italian sausage be cooked to?

Kirkland Signature Italian Sausage must reach an internal temperature of 160°F according to USDA guidelines.

Use a meat thermometer inserted into the thickest part of the link. This kills harmful bacteria like Salmonella and E. coli in ground pork products.

How long does it take to cook Costco Italian sausage in an air fryer?

Air fryer Italian sausage takes 10-12 minutes at 360°F.

Flip the links halfway through cooking. For crispier skin, increase temperature to 400°F and reduce time to 8-10 minutes. Always verify internal temp reaches 160°F.

Can you cook Costco Italian sausage from frozen?

Yes. Cook frozen sausage links directly without thawing.

Add 5-6 extra minutes for air fryer, 15 extra minutes for oven baking. The internal temperature must still reach 160°F before eating. Stovetop works but takes longest.

Should you poke holes in Italian sausage before cooking?

No. Never pierce the natural casing.

Poking holes releases juices and fat, resulting in dry sausage. The casing holds moisture inside during cooking. If sausages burst, your heat is too high.

How do you cook Italian sausage on the stovetop without burning it?

Use the water-simmer method. Brown sausages 2-3 minutes per side, then add 1/2 cup water and cover.

Simmer on medium-low heat for 10-12 minutes. This prevents the outside from charring before the inside cooks through.

What is the best way to grill Costco Italian sausage?

Use indirect heat first. Place links away from direct flame for 8-10 minutes per side.

Then move to direct heat for 2-3 minutes to char. Grill temperature should be 375-425°F. Turn with tongs, not a fork.

How long do you bake Italian sausage in the oven at 400°F?

Bake Kirkland Italian sausage for 20-25 minutes at 400°F.

Flip once at the halfway point. Line your sheet pan with foil for easy cleanup. The high heat produces golden brown, caramelized exteriors while keeping insides juicy.

How do you know when Italian sausage is fully cooked?

A meat thermometer reading 160°F is the only reliable indicator.

Color alone is not accurate. Sausage may look brown outside but remain raw inside. Cut one link open to check for pink if you lack a thermometer.

How should you store and reheat leftover Italian sausage?

Refrigerate cooked sausage in an airtight container within 2 hours. Keeps 4-5 days.

Reheat in microwave for 1-2 minutes, air fryer at 350°F for 2-3 minutes, or skillet over medium heat. Target 165°F when reheating.

What can you serve with Costco Italian sausage?

Classic pairings include sauteed bell peppers and onions on hoagie rolls.

Slice over pasta with marinara sauce. Serve alongside roasted Costco potatoes or a simple Caesar salad. Works great chopped into pasta dishes too.

Conclusion

Now you know how to cook Costco Italian sausage using four reliable methods.

Whether you prefer crispy skin from the air fryer or charred grill marks from the barbecue, the key remains the same: reach 160°F internal temperature every time.

A meat thermometer takes the guesswork out of food safety.

These fennel-seasoned pork links work for everything from sheet pan dinners to classic sausage sandwiches with peppers and onions.

At under $11 for 14 links, the Kirkland Signature package delivers solid value for meal prep or feeding a crowd during grilling season.