Imagine the sizzle and aroma of a sumptuous ham gliding from your oven, a masterpiece you’ve crafted with your very own hands. This isn’t just any ham—it’s the talk of the town, Costco’s splendidly savory centerpiece that wins hearts every festive season.

Cooking Costco ham is your voyage to creating those cherished family moments, the ones where everyone gathers around, forks eager, smiles wide.

You’re in for a treat, as I’m spilling the beans on turning that pre-cooked beauty into a dish that sings of your culinary prowess, no matter your kitchen expertise!

You’ll learn from the wisdom of 15 years simmering in the cooking realm. From oven-roasting to mastering the honey glaze, down to carving like a pro—every slice will tell a tale of taste and tenderness.

As we unwrap the secrets behind the perfect Costco spiral ham, be ready to soak in tips on glazingbaking instructions, and pairing sides for your ham dinner. Crisp outside, juicy inside, it’s the ham that dreams are made of.

How To Cook Costco Ham: The Quick Version

To cook a Costco ham, follow these steps:

  1. Preheat the oven to 350°F (175°C).
  2. Remove the ham from its package and cover it completely with aluminum foil.
  3. Cook the ham in the preheated oven for about 1 hour and 30 minutes. Start checking the internal temperature frequently after 1 hour of cooking.
  4. The internal temperature should range between 140°F (60°C) and 160°F (71°C) when the ham is sufficiently heated through.
  5. If the ham comes with a glaze packet, you can add the glaze after about 1 hour of cooking. Combine the glaze package with 45 mL of water in a saucepan and bring it to a boil. Once the ham has been in the oven for about two hours, remove it, pour the glaze over the top, and brush it in between the slices.
  6. After glazing the ham, turn the oven up to 425°F (220°C) and put the ham back in the oven uncovered for eight to 10 minutes.
  7. Let the ham sit out of the oven for about 10 minutes before serving.

This method should yield a delicious, moist ham that’s perfect for your meal.

Preparing the Ham

Selection Tips

Navigating the aisles, eyes catch glints of packaging, each ham vying for attention. Be shrewd—ponder the bone-in’s promise of flavor depth against the boneless version’s nods toward convenience. Size matters too; think of bellies to fill, leftovers to savor.

Understanding labels is like deciphering a map to hidden treasure. “Fully cooked”, “smoke-flavored”, “honey-cured”—each phrase a breadcrumb to the taste adventure of your choosing.

Preparation Techniques

Before the grand act—thawing. Your frozen ham’s clock to readiness starts in the chill sanctuary of the refrigerator, allowing it a graceful descent to perfect pliability.

With the scene set, we turn to pre-cooking rituals. Scoring the hide creates crevices for flavors to seep deep, while a thoughtful marinade whispers promises of tenderness to the fibers.

Cooking Methods

YouTube player

Oven Roasting

A renowned stage for any ham is the oven, where controlled heat weaves a tale of golden perfection around it.

Every step, every temperature read, dances in precision’s embrace. To shield from the drying plight, the ham dons a foil robe, sealing in the juiciness.

Slow Cooking

In the realm of patience, slow cookers reign as kings of flavor and tenderness.

Here, your ham bathes languidly in its own essence, weaving zest and savor into every bite with the artless grace of time.


And then there’s fire—the primal element. A grill’s blaze must be tamed, controlled, for a char that sings rather than stings.

Technique, heat zones, time—they align in a smoky symphony for those bold enough to ignite the flame.

Glazing and Seasoning

Alchemy begins when glazing—the ham’s crowning glory. Glazes, those sweet concoctions, brush strokes at the very end, as heat performs its caramelization rite.

All the while, seasoning’s subtle hand plays its part, uniting notes in a harmony so pure, so precise.

Safety and Internal Temperature

Importance of Cooking to the Right Temperature

Ham’s transformation lies in the sacred realm of thermal precision—too raw, a story of peril; overdone, a tale of woe.

At the right temperature, however, a sweet spot where safety and savor meet.

Using a Meat Thermometer

A meat thermometer, that unerring sentinel, stands guard.

It pierces the ham’s heart, divining truths of warmth and readiness, unfazed by the oven’s bluster or the grill’s bravado.

Serving and Presentation

Carving Techniques

Before the feast unfurls, the carving ritual takes center stage.

A knife’s steel, keen and sure, waltzes through the ham in a dance of precision. Slides smooth, slices uniform—a presentation worthy of the anticipation that trembles in the air.


A ham shines brightest with its retinue of comrades on the side—a cast of dishes in a textural and flavorful play: creamy, crunchy, savory, tart.

Spuds roasted golden, greens with a snap, and decadently veiled mac ‘n’ cheese vie for applause alongside the marquee.

Storage and Leftovers

Storing Cooked Ham

After the fanfare, silence descends, and attention turns to preservation. Tucked safely in the fridge’s embrace or cocooned for a freezer’s slumber, ham’s second act awaits.

Creative Uses for Leftover Ham

When dawn breaks, the remnants of yesterday’s glory are reimagined. Slivers transformed into omelets, chunks stirred into soups—a phoenix’s rise on the palate, the theater of taste reinvented.

Common Mistakes to Avoid

Overcooking and Drying Out

Beware the siren call of too much time, too high heat. Your ham deserves better than a destiny of desiccation, yearns for the moist tenderness befitting its station.


Flavor’s shadow, underseasoning, is a specter lurking. Boldness in spice, courage in herb—the armor these warriors don so the ham may rise to its full, savory crescendo.

And thus, through these acts—from selection to savoring—we recount the narrative of how to cook Costco ham, guiding the way to tales of feasts unforgotten.

FAQ On How To Cook Costco Ham

Do I need to defrost Costco ham before cooking?

Certainly, if your Costco ham is frozen, you’ll want to let it thaw in the fridge for a day or two. Skipping this step can lead to uneven heating or a longer cooking time, making that outer “crisp” you’re aiming for a bit elusive.

What’s the best way to cook a spiral-cut ham without drying it out?

To keep that spiral ham moist, cook it cut-side down. Wrap it in foil and heat gently. The key is low temperature and slow heating. A splash of water in the bottom of the dish adds moisture too!

How long does it take to cook a Costco ham?

Cooking times vary! Typically, it’s about 10 minutes per pound at 325°F. Since it’s pre-cooked, you’re essentially heating it through to a lovely 140°F internal temperature. Use a meat thermometer to be sure.

What temperature should I cook my Costco ham to?

140°F—that’s your magic number. That’s when you know your ham is perfectly warmed throughout. Piping hot and safe to eat, but sheltered from the treacherous land of overdone dryness.

Can I cook my Costco ham in a slow cooker?

Absolutely, a slow cooker is practically a guardian angel for hams! It bathes your ham in consistent, gentle heat, keeping it juicy. Great for those who want to set it and forget it while they whip up some smashing sides for ham dinner.

What is the best glaze for Costco ham?

honey glaze is classic—sweet yet balanced. Brown sugar, a bit of mustard, perhaps a pinch of cloves… The secret? Brush it on in the final 20 minutes, and you’ll get the perfect sticky-sweet crown that glimmers.

Should I cover my ham when baking?

Yes, do it justice and keep it covered. This is what traps steam and prevents your ham from telling a tale of woe. If you’re using a glaze, reveal your ham towards the end to caramelize it.

How do I know if my Costco ham is cooked?

Since it’s pre-cooked, you’re playing more of a “warm-up” game. A meat thermometer will tell no lies—poke it to the center not touching bone, and 140°F means it’s time to ring the dinner bell.

Is it possible to overcook a Costco ham?

In the realm of kitchens, overcooking is the villain lurking in shadows. Be vigilant with your cooking time and temperature. You want it just to the right internal temperature—no more, no less.

What should I serve with Costco ham?

It’s not just about the ham! Think roasted potatoes, green beans almondine, or a bright, zesty salad. And don’t forget a rich, creamy mac ‘n’ cheese to contrast with the ham’s sweet and savory song.


Wrapping up our culinary journey, we’ve unlocked the secrets of how to cook Costco ham with finesse and flavor.

  • Start with a gentle thawing in the embrace of your fridge, then swaddle your ham in foil, and let the oven’s warmth coax it to a succulent 140°F.
  • Embrace the artistry of a glaze, painting on that honeyed sweetness in the final act, creating a caramelized masterpiece that’ll have taste buds standing ovation.

Regardless of the path you choose—be it traditional oven warmth or the mellow hug of a slow cooker—know that the perfect ham is a dance of temperature, timing, and a dash of love. And when you lay it on the table, surrounded by sides that sing in harmony, your Costco ham becomes more than a meal; it’s a memory crafted, a moment shared. Toast to that.

Categorized in: