How to Cook Costco Stuffed Peppers Easily

Kirkland Signature Stuffed Bell Peppers are a pre-made meal from Costco’s deli section.

Each package contains six bell pepper halves (two red, two orange, two yellow) filled with seasoned ground beef, rice, and a blend of three cheeses.

The ground beef comes fully cooked. The rice is parboiled. You just need to heat everything through.

Most people grab these for busy weeknights when cooking from scratch feels like too much work. They’re also solid for meal prep since you can freeze individual peppers and reheat them later.

This guide covers three cooking methods: oven baking (50-60 minutes), air fryer (15-18 minutes), and microwave (5-6 minutes). Pick whichever fits your schedule.

Product Details

Product: Kirkland Signature Stuffed Bell Peppers with Ground Beef & Rice

Type: Pre-cooked (refrigerated, not frozen)

Package Size: 3.5-4 lbs (6 stuffed pepper halves)

Price: $4.99-$5.49 per lb / approximately $17-$20 per package at Costco (Updated January 2025)

Storage: Refrigerate and use within 3 days of package date, or freeze for up to 3 months

Calories per Serving: 310-345 per pepper

Main Ingredients: Bell peppers, cooked ground beef, parboiled rice, tomato paste, mozzarella cheese, provolone cheese, parmesan cheese, onion, garlic, vinegar, sugar, salt, spices

Item Number: 42940

Cooking Methods Comparison

Recommended Method: Air fryer for smaller batches. Produces charred bell pepper edges and a crispy cheese crust in one-third the oven time.

Method 1: Oven (Package Instructions)

The conventional oven method takes longer but works well when cooking all six peppers at once. Expect tender bell peppers with melted cheese topping after about an hour.

Step 1: How Do You Prepare the Peppers?

Remove the plastic lid from the aluminum tray. The peppers cook right in the container they come in.

Instructions:

1. Take off plastic lid and discard
2. Preheat oven to 400°F while peppers sit at room temperature for 5-10 minutes
3. Cover tray tightly with aluminum foil

Equipment: Aluminum foil, oven mitts, baking sheet (optional, catches drips)

Step 2: What Temperature and Time Do You Use?

Bake at 400°F for 50-60 minutes. The foil covering prevents the cheese from burning while the filling heats through.

Instructions:

1. Place covered tray on center rack
2. Set timer for 50 minutes
3. Check internal temperature with food thermometer

Temperature: 400°F

Time: 50-60 minutes (covered with foil)

Step 3: When Do You Remove the Foil?

Take off the foil during the last 10-15 minutes if you want browned, slightly crispy cheese on top.

Instructions:

1. At the 45-minute mark, carefully remove foil
2. Continue baking uncovered for remaining time
3. Watch for golden brown cheese

Checkpoint: At 45-minute mark, remove foil for browning

Step 4: How Do You Know When They’re Done?

The filling should reach 165°F internal temperature. You’ll see steam rising and bubbling cheese.

Instructions:

1. Insert food thermometer into center of filling
2. Confirm temperature reaches at least 165°F
3. Let rest 2-3 minutes before serving (hot liquid will settle)

Target Temperature: 165°F minimum

Visual Indicator: Bubbling cheese, steam rising from filling, slightly charred pepper edges

Method 2: Air Fryer (Recommended)

The air fryer cuts cooking time by two-thirds and produces better texture. The bell peppers get slightly charred while the beef and cheese develop a crispy crust. This is my preferred method.

Step 1: How Do You Prepare for Air Frying?

Transfer peppers from the aluminum tray to a heat-safe dish or line the air fryer basket.

Instructions:

1. Preheat air fryer to 360-375°F for 3-4 minutes
2. Remove peppers from foil tray
3. Place in single layer in basket or on heat-safe dish
4. Leave space between peppers for air circulation

Equipment: Air fryer, parchment paper or heat-safe dish, tongs

Step 2: What Temperature and Time Do You Use?

Cook at 360-375°F for 15-18 minutes. Smaller air fryers may need batches of 2-3 peppers.

Instructions:

1. Set temperature to 360-375°F
2. Cook for 15-18 minutes total
3. Adjust time based on your air fryer model

Temperature: 360-375°F

Time: 15-18 minutes

Step 3: When Do You Check the Peppers?

Check halfway through to ensure even cooking. If cheese browns too fast, tent loosely with foil.

Instructions:

1. At 8-minute mark, check browning
2. Rotate peppers if cooking unevenly
3. Cover with foil if cheese is browning too quickly

Checkpoint: At 8-minute mark

Step 4: How Do You Know When They’re Done?

Internal temperature should hit 165°F. The edges of the bell pepper will have light charring, and cheese forms a golden crust.

Instructions:

1. Check internal temperature with thermometer
2. Look for charred pepper edges and bubbling cheese
3. Let cool 2-3 minutes before eating

Target Temperature: 165°F

Visual Indicator: Charred bell pepper edges, golden cheese crust, steam rising

Method 3: Microwave (Fastest)

The microwave works for single servings when you need food fast. Texture suffers compared to other methods, but heating takes just 5-6 minutes.

Step 1: How Do You Prepare for Microwaving?

Transfer peppers to a microwave-safe dish. Never microwave in the aluminum tray.

Instructions:

1. Remove peppers from foil container
2. Place 1-2 peppers in microwave-safe dish
3. Cover loosely with microwave-safe lid or damp paper towel

Equipment: Microwave-safe dish, lid or paper towel

Step 2: What Power Level and Time Do You Use?

Microwave on HIGH for 5-6 minutes. Time varies based on wattage and number of peppers.

Instructions:

1. Set microwave to HIGH (100% power)
2. Heat for 2-3 minutes per pepper
3. Add 1-2 minutes for each additional pepper

Power Level: HIGH (100%)

Time: 5-6 minutes for 1-2 peppers

Step 3: When Do You Check During Heating?

Stop halfway to check progress and rotate the dish for even heating.

Instructions:

1. At 3-minute mark, pause and rotate dish
2. Check if filling is heating evenly
3. Continue heating

Checkpoint: At 3-minute mark

Step 4: How Do You Know When They’re Done?

Filling should be steaming hot throughout. Use a thermometer to confirm 165°F.

Instructions:

1. Insert thermometer into center of filling
2. Confirm 165°F minimum temperature
3. Let stand 1 minute before eating

Target Temperature: 165°F

Visual Indicator: Steam rising, cheese melted, no cold spots in center

Safety & Quality Indicators

Food Safety:

• Internal Temperature: 165°F minimum for ground beef products
• Steam Check: Product should steam when cut open
• Thawing: If frozen, thaw overnight in refrigerator before cooking

Quality Indicators (Done Properly):

• Color: Golden brown cheese, slightly charred pepper edges
• Texture: Tender bell pepper, heated-through filling
• Temperature: Hot throughout, no cold spots
• Appearance: Bubbling cheese, visible steam

Signs of Overcooking:

• Blackened or burnt cheese topping
• Dried out, crumbly filling
• Mushy, collapsed bell peppers

Serving Suggestions

Portion Size: 1-2 peppers per person (6 servings per package, or 3 servings if serving 2 per person)

Serving Ideas:

• Add extra shredded mozzarella or cheddar during last 5 minutes of cooking
• Top with sour cream and fresh cilantro after cooking
• Drizzle with hot sauce or salsa for extra kick

Pairing Recommendations:

• Caesar salad or mixed green salad
• Costco garlic bread
• Steamed vegetables like asparagus or green beans
• Costco mashed potatoes
• Mexican street corn

Storage & Reheating

Leftover Storage:

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

Freezing Instructions:

• Wrap individual peppers tightly in plastic wrap
• Place wrapped peppers in freezer bag
• Freeze for up to 3 months
• Thaw overnight in refrigerator before reheating

Reheating Instructions:

• Microwave: 2-3 minutes on HIGH
• Air Fryer: 350°F for 5-8 minutes
• Oven: 350°F for 15-20 minutes (covered with foil)
• Target Temperature: 165°F

Troubleshooting Common Issues

Issue: Peppers are soggy or mushy

Cause: Overcooking or too much trapped moisture

Solution: Reduce cooking time by 5-10 minutes. Remove foil earlier for oven method. Tip tray to drain excess liquid before serving.

Issue: Filling is cold in the center

Cause: Insufficient cooking time or peppers were too cold when cooking started

Solution: Let peppers sit at room temperature 10-15 minutes before cooking. Use a food thermometer to confirm 165°F internal temperature.

Issue: Cheese is burnt but filling isn’t hot

Cause: Cooking uncovered too long, or temperature too high

Solution: Keep foil on for first 40 minutes (oven) or until last 3-4 minutes (air fryer). Lower temperature by 25°F if browning too fast.

Issue: Peppers fell apart during cooking

Cause: Peppers were frozen and cooked without thawing first

Solution: Always thaw frozen peppers in refrigerator overnight before cooking. Cooking from frozen causes uneven heating and structural breakdown.

Product Variations & Related Items

Similar Costco Products:

• Costco meatloaf – Another ground beef option, similar cook time
• Costco lasagna – Family-size Italian meal, longer bake time
• Costco shepherd’s pie – Comfort food with similar prep simplicity
• Costco mac and cheese – Good side dish pairing

Cooking Time Adjustments:

If cooking fewer than 6 peppers, reduce oven time by 5-10 minutes. Air fryer times stay roughly the same regardless of quantity since portions are smaller anyway.

For softer, sweeter bell peppers, add 10-15 minutes to oven cooking time at the same temperature.

FAQ on How To Cook Costco Stuffed Peppers

What temperature do you cook Costco stuffed peppers?

Bake at 400°F in a conventional oven for 50-60 minutes.

For air fryer cooking, set temperature to 360-375°F and cook for 15-18 minutes.

Both methods require the internal temperature of the ground beef filling to reach 165°F before serving.

Can you cook Costco stuffed peppers in an air fryer?

Yes. The air fryer produces better results than the oven method in my experience.

Cook at 360-375°F for 15-18 minutes. The bell peppers get slightly charred edges while the cheese forms a crispy crust.

Transfer peppers from the aluminum tray to the air fryer basket first.

Do you need to thaw Costco stuffed peppers before cooking?

If frozen, yes. Thaw overnight in the refrigerator before baking.

Cooking from frozen causes uneven heating. The outside overcooks while the center stays cold.

Fresh peppers from Costco’s deli are refrigerated, not frozen, so they’re ready to cook immediately.

How long do Costco stuffed peppers take in the microwave?

Heat on HIGH power for 5-6 minutes for 1-2 peppers.

Always transfer to a microwave-safe dish first. The foil container will spark.

Rotate the dish halfway through for even heating. Check that internal temperature reaches 165°F.

Should you cover Costco stuffed peppers with foil when baking?

Yes, for most of the cooking time. Cover tightly with aluminum foil for the first 40-45 minutes.

Remove foil during the last 10-15 minutes if you want golden brown cheese on top.

Keeping them covered prevents the cheese topping from burning before the filling heats through.

How many servings are in a package of Costco stuffed peppers?

Each package contains six stuffed bell pepper halves.

This feeds 3-6 people depending on appetite. Two peppers per person works for a standalone meal.

Stretch to six servings by pairing with sides like salad, Costco frozen vegetables, or rice.

Can you freeze leftover Costco stuffed peppers?

Yes. Wrap each pepper individually in plastic wrap, then place in a freezer bag.

Frozen stuffed peppers keep for up to 3 months.

Thaw in the refrigerator overnight before reheating. Expect slightly softer texture after freezing.

What sides go well with Costco stuffed peppers?

Caesar salad and crusty bread are classic pairings.

Steamed asparagus, green beans, or roasted vegetables balance the hearty ground beef and rice filling.

Some people serve them with Costco jasmine rice or Costco potatoes for extra carbs.

Are Costco stuffed peppers already cooked?

Partially. The ground beef is fully cooked and the rice is parboiled.

You still need to heat everything to 165°F internal temperature before eating.

The bell peppers are raw and will soften during the baking process.

How do you reheat leftover Costco stuffed peppers?

Microwave for 2-3 minutes on HIGH for quickest results.

Air fryer at 350°F for 5-8 minutes gives better texture with slightly crispy cheese.

Oven reheating takes 15-20 minutes at 350°F covered with foil. Always confirm 165°F internal temperature.

Conclusion

Now you know how to cook Costco stuffed peppers using three different methods. The air fryer wins for speed and texture. The oven works best for feeding the whole family at once.

Always check that the internal temperature reaches 165°F before serving.

These Kirkland Signature stuffed bell peppers make weeknight dinners easy. Ground beef, rice, tomato sauce, and melted cheese in one convenient package.

Store leftovers in an airtight container for up to 4 days. Freeze individually wrapped peppers for longer storage.