How to Cook Costco Breakfast Sandwiches

The Kirkland Signature Breakfast Sandwich is a frozen bacon, egg and cheese croissant sold at Costco warehouses across the country.

Each sandwich comes individually wrapped and fully cooked. Just heat and eat.

This grab and go breakfast option works great for busy mornings, camping trips, or when you need a quick protein-packed meal without the effort of cooking from scratch.

The box contains 8 sandwiches. Most people heat one or two at a time.

This guide covers three cooking methods: air fryer, microwave, and oven. Total cooking time ranges from 75 seconds to 25 minutes depending on your equipment.

Product Details

Product: Kirkland Signature Croissant Breakfast Sandwich (Applewood Smoked Bacon, Egg and Cheese)

Type: Fully cooked, frozen

Package Size: 38.56 oz total (8 sandwiches at 4.82 oz each)

Price: $15.99 at Costco (Updated December 2024)

Storage: Keep frozen at 0°F or below. Can thaw in refrigerator for up to 3 days.

Calories per Serving: 390

Main Ingredients: Spiral butter croissant, cage-free egg patty, applewood smoked bacon, cheddar cheese

Item Number: 1748763

Cooking Methods Comparison

Recommended Method: Air fryer for crispy croissant texture and fully melted cheese in under 6 minutes.

Method 1: Air Fryer (Recommended)

The air fryer produces a crispy exterior with buttery, flaky layers. Takes 4-6 minutes at 350°F. Works best for 1-2 sandwiches.

Step 1: How Do You Prepare the Sandwich?

You need to remove the plastic wrapper and separate the croissant from the filling. This prevents uneven heating.

Instructions:

1. Remove sandwich from plastic wrapper
2. Open the sandwich between the egg patty and croissant top
3. Place both halves in the air fryer basket, cut side up

Equipment: Air fryer (Ninja Foodi, Cosori, or similar), spatula

Step 2: What Temperature and Time Do You Use?

Preheat to 350°F. Cooking time runs 4-6 minutes depending on your specific air fryer model.

Instructions:

1. Preheat air fryer to 350°F
2. Cook for 4-6 minutes until croissant turns golden brown

Temperature: 350°F

Time: 4-6 minutes (from frozen)

Some air fryers run hot. If your croissant burns before the cheese melts, try 385°F for 8 minutes then finish with 1 minute in the microwave.

Step 3: When Do You Check the Sandwich?

Check at the 4-minute mark. Look for golden edges on the croissant and bubbling cheese.

Instructions:

1. Check at 4 minutes
2. Look for melted cheese and golden croissant

Checkpoint: At 4-minute mark

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

The croissant should be golden brown with visible steam. Cheese needs to be fully melted with no cold spots.

Instructions:

1. Check that croissant is golden and flaky
2. Confirm cheese is melted throughout
3. Reassemble the sandwich carefully
4. Let stand for 1 minute before eating

Target Temperature: 165°F internal

Visual Indicator: Golden brown croissant, melted cheese, steam rising when opened

Method 2: Microwave

Fastest option at 75 seconds. The croissant will be softer and chewier compared to air frying. Works great when you need breakfast in under 2 minutes.

Step 1: How Do You Prepare the Sandwich?

Keep the sandwich assembled. Wrap it in a paper towel to absorb moisture and prevent soggy bread.

Instructions:

1. Remove sandwich from plastic wrapper
2. Wrap completely in a paper towel
3. Place on a microwave-safe plate

Equipment: Paper towel, microwave-safe plate

Step 2: What Temperature and Time Do You Use?

Cook on HIGH power for 75 seconds from frozen. Takes only 45 seconds if you thawed it in the refrigerator overnight.

Instructions:

1. Microwave on HIGH for 75 seconds (from frozen)
2. Microwave on HIGH for 45 seconds (from refrigerated)
3. Add 10 seconds if not hot enough

Power Level: HIGH (100% power)

Time: 75 seconds (frozen) / 45 seconds (thawed)

Step 3: When Do You Check the Sandwich?

Check after the initial cook time. The center should be hot throughout.

Instructions:

1. Carefully unwrap and check center temperature
2. If cold spots exist, microwave additional 10 seconds

Checkpoint: After 75 seconds

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

The egg patty should be steaming and cheese fully melted. Let it rest before eating.

Instructions:

1. Sandwich should steam when opened
2. Cheese should be melted throughout
3. Let stand 30 seconds in paper towel before unwrapping

Target Temperature: 165°F internal

Visual Indicator: Steaming hot, melted cheese, no cold center

Method 3: Oven / Toaster Oven

Takes longer but produces consistent results. Good for heating multiple sandwiches at once. Expect 20-25 minutes total cooking time.

Step 1: How Do You Prepare the Sandwich?

Separate the sandwich components for even heating. The croissant crisps up nicely when baked open-faced.

Instructions:

1. Preheat oven to 350°F
2. Remove sandwich from plastic wrapper
3. Separate between croissant top and egg/bacon/cheese bottom
4. Place both halves on a baking sheet lined with parchment paper

Equipment: Baking sheet, parchment paper, oven mitts

Step 2: What Temperature and Time Do You Use?

Bake at 350°F for 20-25 minutes. The croissant should turn golden and the cheese should bubble.

Instructions:

1. Place separated sandwich halves in preheated oven
2. Bake for 20-25 minutes

Temperature: 350°F

Time: 20-25 minutes

Step 3: When Do You Check the Sandwich?

Check at 15 minutes. Add croissant top for last 2-3 minutes if you want extra crispiness.

Instructions:

1. Check progress at 15 minutes
2. Rotate baking sheet if heating unevenly

Checkpoint: At 15-minute mark

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

The croissant turns golden brown with flaky layers. Cheese should be melted and bubbling.

Instructions:

1. Croissant should be golden and crispy
2. Use a food thermometer to check internal temperature
3. Reassemble and let cool for 2 minutes

Target Temperature: 165°F internal

Visual Indicator: Golden brown croissant, bubbling cheese, steaming egg

Safety and Quality Indicators

Food Safety

• Internal Temperature: 165°F minimum
• Steam Check: Product should steam when cut open
• Thawing: Can cook from frozen or thaw overnight in refrigerator (up to 3 days)

Quality Indicators (Done Properly)

• Color: Golden brown croissant with visible flaky layers
• Texture: Crispy exterior, tender interior (air fryer/oven) or soft throughout (microwave)
• Temperature: Hot throughout with no cold spots
• Appearance: Melted cheese, steaming bacon and egg

Signs of Overcooking

• Dark brown or burnt croissant edges
• Dried out egg patty with rubbery texture
• Cheese that has hardened instead of staying gooey

Serving Suggestions

Portion Size: 1 sandwich per serving (8 servings per box)

Serving Ideas:

• Add hot sauce or sriracha to cut through the saltiness
• Pair with fresh fruit or a side salad for balance
• Serve with hash browns or a smoothie for a complete morning meal

Pairing Recommendations:

• Coffee, orange juice, or a protein shake
• Fresh sliced avocado on the side
• Roasted potatoes or fruit salad

If you enjoy frozen breakfast items from Costco, you might also want to try preparing Costco Belgian waffles or learn the best methods for cooking Costco breakfast sausage to round out your morning meal.

Storage and Reheating

Leftover Storage

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

Reheating Instructions

• Microwave: 30-45 seconds on HIGH, wrapped in paper towel
• Air Fryer: 2-3 minutes at 350°F
• Target Temperature: 165°F

Troubleshooting Common Issues

Issue: Croissant is soggy

Cause: Excess moisture from microwave or not separating sandwich before air frying

Solution: Use air fryer instead of microwave. Always separate the sandwich halves before cooking in an air fryer or oven.

Issue: Cheese not melted but croissant is burnt

Cause: Air fryer temperature too high

Solution: Lower temperature to 350°F. Or try the hybrid method: 8 minutes at 385°F in air fryer, then 1 minute in microwave to finish melting the cheese.

Issue: Cold center

Cause: Sandwich too thick or cooking time too short

Solution: Separate sandwich halves before cooking. Add 1-2 minutes to cook time. Use a food thermometer to check for 165°F internal temperature.

Issue: English muffin (Eat-In version) is too chewy

Cause: Microwave heating method

Solution: Pop the frozen egg out, microwave the egg separately for 1 minute, then microwave the bun with cheese and bacon open-faced for 1 minute. Reassemble.

Product Variations and Related Items

Similar Costco Breakfast Products

• Eat-In Breakfast Sandwich (Item #1164991) – English muffin version with bacon, egg and cheese. 250 calories per sandwich. Different texture than the croissant version.
• Jimmy Dean Sausage, Egg and Cheese Croissant – Uses sausage patty instead of bacon. Similar cooking instructions.
• Starbucks Sous Vide Egg Bites – If you want to try another Costco breakfast item, check out how to cook Costco Starbucks egg bites in the air fryer.

Cooking Time Adjustments

The Eat-In Breakfast Sandwich (English muffin version) needs 90 seconds in the microwave instead of 75 seconds due to the denser bread.

If cooking multiple Kirkland croissant sandwiches in the oven, add 5 minutes to total cooking time and rotate the pan halfway through.

Which Method Should You Choose?

Choose Air Fryer when:

• You want the crispiest, most restaurant-like texture
• Cooking 1-2 sandwiches
• You have 6 minutes to spare

Choose Microwave when:

• Speed is your priority (under 2 minutes)
• Cooking a single sandwich
• Texture matters less than convenience

Choose Oven when:

• Heating 3+ sandwiches for the family
• You want even, consistent results
• You have 25 minutes available

Time Comparison: Microwave (75 sec) < Air Fryer (4-6 min) < Oven (20-25 min)

Texture Ranking: Air Fryer (crispiest) > Oven (crispy) > Microwave (soft/chewy)

Nutrition Facts

Per sandwich (4.82 oz / 137g):

• Calories: 390
• Total Fat: 23g (35% DV)
• Saturated Fat: 12g (60% DV)
• Sodium: 760mg (33% DV)
• Carbohydrates: 33g (12% DV)
• Fiber: 1g (4% DV)
• Sugar: 5g
• Protein: 17g (34% DV)

The 17 grams of breakfast protein helps keep you full until lunch. Be aware that one sandwich contains about a third of your daily recommended sodium intake.

Allergens: Contains wheat, milk, egg, and soy.

Quick Reference Card

Air Fryer

• Temp: 350°F
• Time: 4-6 minutes
• Separate sandwich first
• Best texture

Microwave

• Power: HIGH
• Time: 75 seconds (frozen) / 45 seconds (thawed)
• Wrap in paper towel
• Let stand 30 seconds

Oven

• Temp: 350°F
• Time: 20-25 minutes
• Separate sandwich
• Use parchment paper

Always check for 165°F internal temperature before eating.

FAQ on How To Cook Costco Breakfast Sandwiches

How long do you microwave Costco breakfast sandwiches?

Microwave the frozen Kirkland Signature breakfast sandwich on HIGH for 75 seconds.

If thawed overnight in the refrigerator, reduce to 45 seconds. Wrap in a paper towel first. Let stand 30 seconds before eating.

Can you cook Kirkland breakfast sandwiches in an air fryer?

Yes. The air fryer is the recommended cooking method on the box.

Preheat to 350°F, separate the croissant from the filling, and cook 4-6 minutes. This produces a crispy, flaky texture.

What temperature do you cook Costco breakfast sandwiches?

Use 350°F for both air fryer and oven methods.

Air fryer takes 4-6 minutes. Oven takes 20-25 minutes. Always check that the internal temperature reaches 165°F before eating the egg and cheese sandwich.

Do you need to thaw Costco breakfast sandwiches before cooking?

No. You can cook them directly from frozen.

Thawing overnight in the refrigerator is optional. It reduces microwave time to 45 seconds and air fryer time to 3-4 minutes. Never thaw at room temperature.

How do you make Costco breakfast sandwiches crispy?

Use an air fryer instead of the microwave.

Separate the croissant from the bacon, egg, and cheese before cooking. This lets hot air circulate and creates those flaky, buttery layers everyone wants.

Can you cook Costco breakfast sandwiches in a regular oven?

Yes. Preheat to 350°F and bake for 20-25 minutes.

Place separated halves on a baking sheet with parchment paper. Good option when heating multiple sandwiches for the family breakfast.

How many calories are in a Kirkland breakfast sandwich?

Each sandwich contains 390 calories, 23g fat, 17g protein, and 760mg sodium.

The protein content helps keep you full until lunch. One sandwich is a single serving from the 8-count box.

Are Costco breakfast sandwiches fully cooked?

Yes. The Kirkland Signature breakfast sandwiches are fully cooked and frozen.

You only need to heat them, not cook them. Still, make sure the internal temperature hits 165°F for food safety.

Why is my Costco breakfast sandwich soggy?

Microwaving causes moisture buildup in the croissant.

Switch to an air fryer for crispy results. If using the microwave, wrap in a paper towel to absorb excess moisture and separate the halves when possible.

Can you refrigerate Costco breakfast sandwiches after cooking?

Yes. Store cooked leftovers in an airtight container within 2 hours.

Consume within 3-4 days. Reheat in the microwave for 30-45 seconds or air fryer for 2-3 minutes until hot throughout.

Conclusion

Knowing how to cook Costco breakfast sandwiches saves you time on busy mornings. The air fryer method delivers the best crispy texture in under 6 minutes.

Microwave works when speed matters most. Oven heating handles batch cooking for the whole family.

Always check for 165°F internal temperature before eating. Separate the croissant halves for even heating and better cheese melting.

At about $2 per sandwich, the Kirkland Signature version beats fast food prices while giving you a protein-packed morning meal right from your freezer.