Costco Frozen Salmon (Easy Copycat Recipe)
Costco frozen salmon is one of the best weeknight shortcuts in any freezer, and this recipe shows you how to turn those thick fillets into something worth sitting down for. No thawing required, no fuss, just a crisp-skinned, flaky result that comes together in under 30 minutes.
The method is straightforward: a quick sear on the stovetop, then a finish in a hot oven with a sticky soy-honey glaze. It works every time.
Why I Love This Recipe
The glaze is salty and slightly sweet, and it caramelizes against the heat so the edges of the fillet get a little lacquered and crisp. That contrast with the soft, flaky interior is what keeps this in rotation.
It also holds up well if you pull it out of the freezer on a weeknight with no plan. The cook time is forgiving enough that a minute or 2 either way will not ruin anything.
This is the version I keep coming back to because it does not ask much of you and still tastes like you put in effort.
Recipe Ingredients
- 4 Costco frozen salmon fillets (about 6 oz each) – Skin-on works best for searing; no need to thaw
- 2 tbsp olive oil – For searing; avocado oil also works
- 3 tbsp soy sauce – Use low-sodium if you prefer a less salty glaze
- 2 tbsp honey – Gives the glaze its sticky, caramelized edge
- 1 tbsp rice vinegar – Cuts through the richness; apple cider vinegar is a fine swap
- 3 cloves garlic, minced – Fresh is noticeably better here than powdered
- 1 tsp grated fresh ginger – Adds brightness; skip it if you do not have it
- 1/2 tsp red pepper flakes – Optional, for a little heat
- 1 tbsp sesame seeds – For garnish
- 2 green onions, thinly sliced – For garnish; adds a fresh, sharp note to the finished plate
Variations / Substitutions
- Maple syrup instead of honey – The glaze will be a little thinner but still caramelizes well and adds a deeper, earthier sweetness.
- Tamari instead of soy sauce – Makes this fully gluten-free with no other changes needed.
- Sriracha instead of red pepper flakes – Adds heat and a slight tanginess; start with 1 tsp and taste before adding more.
- Lemon juice instead of rice vinegar – The glaze will be brighter and more citrus-forward.
- Miso paste stirred into the glaze – A tablespoon of white miso adds a deeper, savory layer that works really well with salmon.
- Dairy-free – This recipe is already dairy-free as written, so no swaps needed.
If you enjoy this style of glazed fish, you might also like a Teriyaki Salmon Sheet Pan Dinner.
How To Make Costco Frozen Salmon
Step 1: Sear the Salmon
Preheat your oven to 400°F (200°C). While it heats, pat the 4 frozen salmon fillets dry with paper towels as best you can — there will be some surface ice, and getting rid of moisture is what lets the skin crisp instead of steam. Heat the 2 tbsp olive oil in an oven-safe skillet over medium-high heat until it shimmers, about 2 minutes. Lay the fillets skin-side down, press each one gently with a spatula for 10 seconds so the skin makes full contact with the pan, and sear for 4 minutes without moving them.
The skin should pull away from the pan cleanly after 4 minutes and look deep golden at the edges. If it is still sticking, give it another 30 seconds. A stuck fillet just needs more time; forcing it tears the skin.
Do not crowd the pan. If your skillet is smaller than 12 inches, sear in 2 batches and return everything to the pan before it goes in the oven.
Step 2: Whisk the Glaze
While the salmon sears, combine the 3 tbsp soy sauce, 2 tbsp honey, 1 tbsp rice vinegar, 3 cloves minced garlic, 1 tsp grated ginger, and the 1/2 tsp red pepper flakes in a small bowl and whisk until the honey is fully dissolved.
The glaze should look glossy and run easily off the whisk. If the honey is cold and clumping, microwave the bowl for 10 seconds and whisk again.
Step 3: Glaze and Roast the Salmon
Flip the fillets flesh-side down for 1 minute, then flip them back so they are skin-side down again. Pour the glaze evenly over the fillets and transfer the skillet to the 400°F (200°C) oven. Roast for 8 to 10 minutes, until the internal temperature reads 125°F (52°C) for medium or 145°F (63°C) for fully cooked through.
Because these started frozen, the center takes a little longer to come up than a thawed fillet would. Check with an instant-read thermometer at the 8-minute mark and go from there.
The glaze will bubble and thicken in the oven and coat the top of each fillet in a sticky, amber-colored layer. That is exactly what you want.
Step 4: Plate and Garnish the Salmon
Pull the skillet from the oven and, using a wide spatula, transfer each fillet to a plate or serving platter. Spoon any remaining glaze from the pan over the top, then scatter the 1 tbsp sesame seeds and sliced green onions over each piece. Serve immediately, while the glaze is still glossy and the skin is at its crispest.
Recipe Tips
- Start checking for doneness at 8 minutes. Because Costco salmon fillets vary in thickness, a thick center-cut piece may need the full 10 minutes while a thinner tail piece could be ready sooner.
- Use an oven-safe skillet. Cast iron or stainless steel both work. If you only have a non-stick pan that is not oven-safe, sear in the pan and transfer the fillets to a foil-lined baking sheet before adding the glaze and roasting.
- Do not skip the paper towel step. Drying the surface of the frozen fillet is the single biggest factor in getting a proper sear rather than a steamed, grey exterior.
- Leftover salmon is excellent cold flaked over a salad or tucked into a grain bowl the next day. The glaze holds its flavor well overnight.
Roasting times by fillet thickness (at 400°F / 200°C, after a 4-minute stovetop sear):
| Fillet Thickness | Roast Time (Medium, 125°F) | Roast Time (Well Done, 145°F) |
|---|---|---|
| 3/4 inch | 6 to 7 mins | 8 mins |
| 1 inch | 8 mins | 10 mins |
| 1 1/4 inch | 10 mins | 12 mins |
How To Store
- Refrigerate – Store cooled leftovers in an airtight container for up to 3 days.
- Reheating – The oven works better than the microwave here. Place the fillet on a baking sheet at 275°F (135°C) for about 12 minutes. It will not be as crisp as fresh, but it heats through evenly without drying out the flesh.
- Serve Cold – Cold leftover salmon flaked over rice, greens, or noodles is genuinely good and does not need reheating.
What To Serve With Costco Frozen Salmon
Steamed or roasted broccoli is a natural match because its slight bitterness cuts through the sweetness of the glaze. Jasmine rice or a simple cucumber salad dressed with a little rice vinegar also work well, since the clean, mild flavors give the salmon room to be the main event. If you want something heartier, soba noodles tossed with a small splash of sesame oil round out the bowl without competing with the glaze.
Frequently Asked Questions
Can I use thawed salmon instead of cooking it from frozen?
Yes. Reduce the oven roasting time by about 3 to 4 minutes and start checking the internal temperature at the 5-minute mark.
Can I make the glaze ahead of time?
Yes, up to 5 days ahead. Store it in a sealed jar in the fridge and give it a quick whisk before using, since the honey can settle to the bottom.
What if I do not have an oven-safe skillet?
Sear the fillets in any pan on the stovetop, then transfer them to a foil-lined baking sheet, pour the glaze over the top, and roast as directed. You will lose a little of the collected pan drippings but the result is nearly identical.
Can I double the recipe for a larger group?
Yes. Keep the glaze quantities the same (it is enough for up to 8 fillets) and sear in 2 batches so you do not steam the fish. Use 2 baking sheets in the oven if needed, and add 1 to 2 minutes to the roasting time.
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Ingredients
Method
- Preheat the oven to 400°F (200°C). Pat the 4 frozen salmon fillets dry, heat the 2 tbsp olive oil in an oven-safe skillet over medium-high, and sear the fillets skin-side down for 4 minutes until the skin is golden and releases cleanly.
- While the salmon sears, whisk together the 3 tbsp soy sauce, 2 tbsp honey, 1 tbsp rice vinegar, 3 cloves minced garlic, 1 tsp grated ginger, and 1/2 tsp red pepper flakes in a small bowl until smooth.
- Flip the fillets flesh-side down for 1 minute, flip back skin-side down, pour the glaze over each fillet, and transfer the skillet to the oven. Roast for 8 to 10 minutes until the internal temperature reaches 125°F (52°C) for medium or 145°F (63°C) for fully cooked.
- Transfer the fillets to a plate, spoon any remaining pan glaze over the top, and garnish with the 1 tbsp sesame seeds and sliced green onions. Serve immediately.
