Skip to Content

How long does it take for frozen spinach to thaw?

Frozen spinach is a convenient way to keep this healthy leafy green on hand for use in recipes anytime. However, before you can use frozen spinach, it needs to be completely thawed. Knowing how long it takes to thaw frozen spinach can help you plan ahead so it’s ready when you need it.

Factors That Affect Thawing Time

Several factors affect how long it takes frozen spinach to thaw:

  • Amount – The more frozen spinach you have, the longer it will take to defrost.
  • Packaging – Spinach frozen in a solid block takes longer than loose frozen leaves.
  • Temperature – Higher ambient temperatures speed up thawing.
  • Thawing method – Some methods thaw spinach faster than others.

Taking these factors into account allows you to estimate the thawing time for frozen spinach in your specific situation.

Thawing Methods

There are several ways you can safely thaw frozen spinach:

Refrigerator Thawing

The simplest way to thaw frozen spinach is in the refrigerator overnight. This slow thawing method keeps the spinach safe by preventing bacterial growth.

To refrigerator thaw frozen spinach:

  1. Take the frozen spinach out of the freezer and place the unopened package in the refrigerator.
  2. Allow the spinach to thaw slowly overnight, or for 8-12 hours.
  3. Check periodically and break up any thawed portions as they soften.
  4. Once completely thawed, use immediately.

Cold Water Thawing

For a faster thawing time, place the frozen spinach in a bowl of cold water. The water will speed up the thawing process from hours to minutes.

To cold water thaw frozen spinach:

  1. Fill a bowl with cold tap water.
  2. Take the frozen spinach out of the package and place it in the water.
  3. Let the spinach sit in the cold water, replacing the water every 30 minutes so it stays cold.
  4. Thaw time is usually around 15-30 minutes depending on the amount.
  5. Drain the spinach well before using.

Microwave Thawing

A microwave can swiftly thaw frozen spinach in just minutes. This method works best for small amounts.

To microwave thaw frozen spinach:

  1. Place the frozen spinach in a microwave-safe container.
  2. Microwave on the defrost setting or low power in short increments, such as 1 minute.
  3. Stir and break up the spinach after each minute to evenly thaw.
  4. Continue microwaving and stirring until completely thawed.
  5. Drain any excess liquid before using.

Thawing Time Guidelines

The thawing time for frozen spinach depends on the amount and thawing method. Here are some general timelines:

Amount Refrigerator Cold Water Microwave
10 oz package 6-8 hours 15-20 minutes 5-7 minutes
20 oz package 10-12 hours 20-30 minutes 7-10 minutes
32 oz package 12-15 hours 30-40 minutes 10-15 minutes

The refrigerator method takes the longest but requires the least effort. Cold water and microwave thawing are faster but require more active time monitoring and changing the water or stirring. Adjust the method based on how much time you have before you need to use the spinach.

Tips for Thawing Frozen Spinach

Follow these tips for best results when thawing frozen spinach:

  • Check the expiration date and make sure the spinach is not past its “best by” date before thawing.
  • Select thawed spinach leaves and discard any with signs of freezer burn or decay.
  • Rinse thawed spinach under cool water to remove any ice crystals or dirt.
  • Squeeze out excess water from thawed spinach to prevent diluted recipes.
  • Use thawed spinach immediately and do not refreeze.

How to Tell When Spinach is Thawed

Here are some signs to look for to determine when frozen spinach is fully thawed and ready to use:

  • No ice crystals remain on the leaves
  • Leaves are dark green instead of hard and icy
  • Spinach is soft and pliable rather than stiff
  • You can easily separate and break apart the frozen block
  • Excess water has drained from the spinach

Test a few leaves to check that there is no crunch or icy texture remaining. Thawed spinach will be completely soft and limp with no stiff or frozen sections.

Can You Cook Frozen Spinach Without Thawing?

It is possible to cook frozen spinach without thawing first. However, there are some drawbacks to this method:

  • Uneven cooking – The frozen and thawed parts will cook at different rates.
  • Lower volume – Frozen spinach reduces down significantly more than fresh when cooked.
  • Watery results – Excess liquid can leach out of frozen spinach as it cooks.
  • Less tender texture – Frozen spinach can turn slimy or mushy if not thawed.

While thawing does take extra time, it generally produces better results in cooked dishes. Thawing unlocks more flavor and allows better control over the final texture.

Cooking Tips for Frozen Spinach

If using frozen spinach in cooked preparations, keep these tips in mind:

  • Cut large frozen blocks into smaller pieces before adding to the pan.
  • Add a small amount of extra oil or water to account for released liquid.
  • Cook over medium-low heat and stir gently to avoid mushiness.
  • Factor in a slightly longer cook time for frozen spinach to heat through.
  • Season cautiously as freezing can concentrate flavors.

Dishes to Make with Thawed Spinach

Once thawed, spinach is ready to use in both raw preparations like salads or smoothies as well as cooked recipes. Here are some delicious ways to use thawed frozen spinach:

Raw Spinach Dishes

  • Smoothies – Add a handful of spinach to fruit smoothies.
  • Dips – Puree thawed spinach with Greek yogurt and spices for a vegetable dip.
  • Salads – Toss thawed spinach with baby greens, veggies, nuts and a light dressing.
  • Sandwiches – Layer thawed spinach leaves on sandwiches and wraps.

Cooked Spinach Dishes

  • Quiche – Sauteed spinach is perfect in a veggie or bacon quiche.
  • Pasta – Add spinach to hot pasta for a quick side or entree.
  • Soup – Stir spinach into minestrone or veggie soup.
  • Fritatta – Combine eggs, cheese and spinach for this easy baked omelette.

With so many possibilities, thawed spinach can be incorporated into breakfast, lunch, dinner or snacks!

Storing Thawed Spinach

Like most thawed frozen produce, spinach is best used immediately after thawing for food safety. But if needed, here are some guidelines for storing thawed spinach:

  • Refrigerator: 1-2 days max
  • Freezer: Not recommended. Thawed spinach will lose quality if refrozen.
  • Reheating: Only reheat thawed spinach if boiling it in a soup or stew, not direct high heat.

For longest shelf life, blanch thawed spinach briefly in boiling water, then squeeze out excess liquid and store in an airtight container in the fridge for up to 2 days.


Thawing frozen spinach completely before use results in tender texture and brighter flavor. While microwave and cold water thawing are fastest, refrigerator thawing requires minimal effort. Allow 6-15 hours for a package of frozen spinach to thaw in the fridge. Look for limp, dark leaves with no ice crystals remaining to determine when spinach is ready to cook or enjoy raw. With proper thawing, frozen spinach can be conveniently substituted for fresh in any recipe.