Frozen corn on the cob can go straight from the freezer into a pot of boiling water—there is no need to thaw it first. Allow about 5–6 minutes of simmering once the water returns to a boil, then serve the hot, tender ears with butter, salt, or your favorite toppings.
Ingredients
- 4 medium frozen ears of corn, about 1½ lb (680 g) total
- 3 qt (2.8 L) water, or enough to cover the ears in your pot
- 1 tsp (6 g) fine salt, optional, for the cooking water
- 2 tbsp (28 g) unsalted butter, for serving, optional
- Extra salt, to taste, for serving
Instructions
- Set up the pot. Choose a large pot that can hold the ears without crowding; a 5- to 6-quart pot works for four medium cobs. Add the water and optional salt, cover the pot, and set it over high heat. While the water heats, remove the corn from its packaging. Keep the ears frozen until they go into the pot. Plan for about 8 minutes for the water to reach a boil, though the exact time depends on your stove, pot, and starting water temperature.
- Add the frozen corn. Carefully lower the ears into the boiling water with tongs. If the cobs are too long for the pot, break them in half while still frozen or use a wider pot. The water will stop boiling when the cold corn goes in. Cover the pot until the water returns to a steady boil, usually about 1–2 minutes. Keep an eye on it so the water does not boil over.
- Simmer until hot and tender. When the water is boiling again, uncover the pot and cook the ears for 5–6 minutes. Turn them once with tongs if they are not fully submerged. The kernels should be hot throughout and tender when pierced with the tip of a knife or tasted carefully. Very large or tightly packed ears may need another minute or two; avoid prolonged boiling, which can make the kernels softer than you want.
- Drain and serve. Lift the corn out with tongs and let excess water drip back into the pot. Set the ears on a serving platter, add butter while they are warm, and season to taste. Serve promptly. The total cooking estimate of 16 minutes includes about 8 minutes to heat the water, up to 2 minutes for the boil to return, and 6 minutes of simmering; allow about 2 minutes for measuring and handling the ingredients.
Tips
- Start from frozen. Thawing is unnecessary and can leave the kernels watery. Add the cobs directly to boiling water, and start the simmering timer only after the water returns to a steady boil. If you thawed the corn already, begin checking it after about 3–4 minutes of simmering because it may heat faster.
- Use enough water and a roomy pot. The ears should be mostly covered so they heat evenly. If your pot is small, cook two ears at a time or snap the cobs in half; overcrowding cools the water more and makes the timing less predictable.
- Keep the seasoning simple in the pot. Salt in the water is optional, and you can season the corn after cooking instead. Butter is best added after draining so it coats the kernels rather than floating away. For a dairy-free option, use olive oil or a plant-based butter, which gives a slightly different flavor.
- Check for tenderness rather than relying only on the clock. Frozen ears differ in size and may have been blanched before freezing, so a minute can make a difference. Take one ear out carefully and test a kernel; if it is still firm or cool in the center, return the cobs to the pot for another minute.
Serving Suggestions
Serve the corn hot as a side for grilled chicken, burgers, barbecue, baked fish, or a simple weeknight meal of beans and rice. For an easy table presentation, pass butter and salt separately so everyone can season an ear to taste. If you are serving a crowd, keep cooked ears on a warm platter and add the toppings just before they reach the table; leaving corn sitting in hot cooking water can make it waterlogged.
For a more complete side dish, pair corn with a crisp green salad, sliced tomatoes, coleslaw, or roasted vegetables. A squeeze of lemon or lime can brighten the sweet kernels, while chopped herbs such as parsley, cilantro, or chives add freshness. If serving corn alongside several rich dishes, offer plain butter and salt rather than a heavy topping so the meal stays balanced in flavor.
Variations
Chili-lime corn: Brush each hot ear with butter, sprinkle with chili powder, and finish with lime juice and a little salt. Add the lime after cooking so the kernels stay bright and the flavor is easy to adjust. Smoked paprika makes a good substitute for chili powder if you want a gentler, smoky note.
Herb butter: Stir 2 tablespoons (28 g) softened butter with 1 tablespoon (4 g) finely chopped parsley or chives and a pinch of black pepper. Spread it over the drained corn. You can use dried herbs if needed, but start with about 1 teaspoon (1 g), since dried herbs have a more concentrated flavor.
Cheesy topping: Sprinkle freshly grated Parmesan over buttered corn and add black pepper. For a dairy-free version, skip the butter and use a small drizzle of olive oil with a savory plant-based seasoning. Keep toppings modest at first; the natural sweetness of the corn should still come through.
Cut kernels for another meal: Once the cooked ears are cool enough to handle, stand each one upright on a cutting board and slice the kernels off with a sharp knife. Stir them into a grain bowl, fold them into a salad, or add them to a soup near the end of cooking. Cut carefully, keeping the flat end steady on the board.
Storage and Reheating
Let leftover corn cool briefly, then refrigerate it within 2 hours of cooking. Store whole ears in a covered airtight container or wrap them well; cooked corn keeps for 3–4 days in the refrigerator. If you have already cut off the kernels, keep them in a sealed container and use them within the same 3–4-day window. Do not leave cooked corn at room temperature for longer than 2 hours.
To reheat whole ears, place them in a covered microwave-safe dish with 1–2 tablespoons (15–30 ml) of water and microwave in 30- to 60-second bursts, turning the ears until hot. You can also warm them in a covered skillet over medium-low heat with a splash of water, or briefly steam them until heated through. Reheat only the amount you plan to eat, and avoid repeatedly warming and cooling the same leftovers.
For longer storage, remove kernels from the cob, cool them promptly, and freeze them in a freezer-safe container or bag. Frozen cooked kernels are best used within about 2–3 months for good texture and flavor. Thaw in the refrigerator or add them directly to a hot dish; freezing whole cooked ears is also possible, though the kernels may be softer after thawing.
Frequently Asked Questions
How long does frozen corn on the cob take to boil?
After the water returns to a steady boil, simmer medium frozen ears for about 5–6 minutes. Add the time needed to heat the water and bring it back to a boil; for four ears, the full stovetop process is usually about 16 minutes after the water and corn are ready to cook.
Do I need to thaw frozen corn before cooking it?
No. Put the ears into boiling water while they are still frozen. Thawing first is not required and may make the kernels wetter. If the corn has already thawed, it will usually need less time, so start checking after 3–4 minutes once the water is simmering.
How can I tell when the corn is done?
The kernels should be hot throughout and tender when pierced or tasted. Remove one ear with tongs and test a kernel carefully, since the corn and water will be hot. If the center is still cool or the kernels seem too firm, simmer for another minute and check again.
Can I cook frozen corn on the cob in the microwave?
Yes. Put one or two frozen ears in a microwave-safe dish with a tablespoon or two of water, cover loosely, and microwave on high for about 4–6 minutes, turning the ears halfway through. Microwave power and ear size vary, so continue in short bursts until the kernels are hot and tender. Use a towel or tongs when removing the cover because escaping steam can burn.
Why did my corn turn mushy?
It was probably cooked longer than necessary or left sitting in hot water after it was tender. Frozen corn is often blanched before freezing, so it needs only enough time to heat through. Drain it as soon as the kernels are tender and serve promptly.
Can I cook several ears at once?
Yes, as long as the pot is large enough for water to circulate around them. For a larger batch, use a roomy pot, keep the ears mostly submerged, and expect the water to take longer to return to a boil. Once it is boiling steadily again, cook for 5–6 minutes and check a kernel before draining.
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