The boneless Seasoned Leg of Lamb at Costco is available in the Costco deli alongside the other prepared foods and meals. This Costco lamb roast meal shortcut is raw but it’s all pre-seasoned and in the baking dish – so this leg of lamb is oven ready for your Easter dinner! See below for pricing, ingredients and cooking instructions! See all our Costco recipes and product directions here.

You won’t usually find this special holiday ready-to-roast boneless lamb meal on Same Day Costco – you should plan on going into the store to pick it up. We recommend purchasing it no more than 3 days before you plan to serve it.

Costco Seasoned Leg of Lamb - Oven Ready - Cooking Directions — Seasoned Leg of Lamb at Costco is Oven Ready and Feeds 10

Roasting Times vary a bit as each piece is a slightly different size. Depending on your preferred levels of rare, medium rare, medium or well done, cooking times may range from 75 minutes to as much as 2 hours and 15 minutes. We recommend calculating it out in advance, and using an in-oven meat thermometer when cooking – especially for holiday meals – it takes away the need to pull it out and check it all the time which is one less thing to worry about when hosting a large party for special meal or holiday!

ProTip: For more even roasting, allow your boneless leg of lamb to come to room temperature before placing it in the oven to bake.

Although this leg of lamb at Costco is not labeled as Gluten Free or Keto Friendly, based on the ingredients, we do believe the oven-ready seasoned lamb roast is suitable for both Keto and Gluten Free dietary needs. The package is labeled for potential allergen cross-contamination, however the Costco Leg of Lamb ingredient list does not contain dairy, shellfish or tree nut ingredients.

If you’re hosting a crowd, check out the new party platters for 2024. These are great hostess shortcuts!

Leg of Lamb at Costco Serving Guide

Each 5 lb Costco Boneless Leg of Lamb Roast will serve approximately 10 guests.

Serve this boneless lamb roast with Costco prepared sides such as the mac n’ cheese and a bagged salad for an easy complete meal. We recommend the Kirkland Signature shrimp cocktail for an appetizer!

Oven Ready Costco Lamb Roast Price and Item Number

Kirkland Signature Seasoned Leg of Lamb, Boneless, Oven-Ready, is Costco Item Number #44528 and costs $7.49/lb. or about $36-$40 for each package.

Costco Seasoned Leg of Lamb Cooking Directions

Costco Seasoned Leg of Lamb Cooking Instructions

Cook Time: 1 hour 30 minutes

Additional Time: 15 minutes

Total Time: 1 hour 45 minutes

These cooking instructions are for the boneless Kirkland Signature seasoned leg of lamb sold in the deli department. Kirkland Signature boneless leg of lamb is raw, fully seasoned and packaged in a disposable roasting pan. Each piece is about ~5lbs. You'll need to adjust your cooking time just slightly based on the size of the piece you purchased and your preferred doneness.

As a rule of thumb, each 5lb Leg of Lamb serves approximately 10 dinner guests.

These roasting instructions should work for most similarly sized raw, boneless legs of lamb - however you will want to season it yourself as the Costco leg of lamb in the deli is pre-seasoned and oven ready.

Ingredients

1 Seasoned Leg of Lamb from Costco

Instructions

Preheat oven to 350 fahrenheit
Remove plastic wrap and place entree container on the center rack of oven
Roast for approximately 90 - 120 minutes or until internal temperature reaches 145 degrees fahrenheit (using an in-oven meat thermometer is recommended) for a medium roast.
Let stand for 15 minutes before serving

Notes

Transfer this Kirkland Signature oven-read seasoned Leg of Lamb to your own roasting dish and no one will ever know you bought it at Costco! wink, wink.

Ingredients in Kirkland Signature Seasoned Leg of Lamb

LAMB LEG (BONELESS), SEASONING (SALT SUGAR, SPICES, DEHYDRATED VEGETABLES (RED BELL PEPPER, GARLIC, ONION)). CITRIC ACID.

Costco Easter Meal and Easter Basket Stuffers:

Costco Garlic Rosemary Rack of Pork Cooking Directions

All opinions expressed on CostContessa are our own. Product features and nutrition information provided on our site is provided to us by third parties, and we do not independently verify its accuracy. Consumers should verify all information. Our content is not intended as a substitute for medical counseling or reading packaging yourself. Please always see actual package information yourself (it can and does change!) and consult your doctor with all questions. 

Seasoned Leg of Lamb at Costco

Leg of Lamb at Costco Serving Guide

Oven Ready Costco Lamb Roast Price and Item Number

Costco Seasoned Leg of Lamb Cooking Directions