Tag Archives: blueberries

Time to Get Blueberries in Your Freezer?

Fresh blueberries laid out in single layer on a tray


Fresh blueberries are in abundant supply in many states now.  Blueberries are easy to freeze and maintain great quality for year-round use in favorites such as muffins, pancakes, and smoothies.  They are nutrient dense and add freshness and flavor to meals.

Blueberries can be prepared for freezing using two methods.  Dry pack and crushed or puŕeed. If you can’t freeze right after picking, refrigerate at 40 degrees F or below until ready to prepare and freeze. Work with small batches to prevent loss of nutrients and quality.

Dry pack is the easiest method.  Most advice says do not wash the blueberries; the skins will toughen if frozen wet. (If you do want to rinse them off with clean water, be sure to completely dry again before packaging and freezing.) Remove leaves, stems, and any bruised or immature berries. Package berries into moisture vapor resistant packaging, either rigid plastic or flexible bags.  Leave headspace.

Tray freezing before dry packaging allows blueberries to remain loose; and easier to remove in smaller amounts.  Spread a single layer of berries on shallow trays and freeze.  Once frozen, remove and promptly package.  Return to the freezer immediately.  When ready to use, remove from packaging and wash blueberries thoroughly by gently rubbing under cold running water.

Crushed or puréed is another method for freezing blueberries.  To prepare for freezing, remove leaves, stems, and any bruised or immature berries.  Wash blueberries thoroughly by gently rubbing under cold running water. Drain in a colander and blot dry with paper towels.

Crush, press through a fine sieve, or process in a food processor or blender. Mix with 1 to 1-1/8 cups sugar with each quart (2 pounds) of crushed berries or purée.  Stir until sugar is dissolved.  Package in freezer containers, leaving headspace.  Label, seal, and freeze promptly.   Keep an accurate inventory of the freezer.  Use first in, first out method to use blueberries at peak quality.

If you plan on using your frozen berries at a later time to make jam or jelly, freeze them unsweetened or follow the proportions of sugar to berries in the jam recipe you will eventually use.

Taking time to freeze fresh blueberries with care will provide delicious, high quality, and nutritious fruit for use year-round.

(The links on this page can be found at https://nchfp.uga.edu)


Brrrrr Berries

various frozen strawberriesDo you like berries in pies, on top of oatmeal, in baked goods, in smoothies, in sauces, or as a refreshing snack?  By following proper preparation steps, you can freeze berries so that they maintain flavor, color, and nutrients for all of these uses and more.  Remember the idea of “quality in, quality out” in selecting fully ripe, firm berries that are not too soft, under-ripe or damaged.

Depending on how you plan to use the berries, you might want to use any one of these packing methods:

A dry pack is simply placing clean berries in freezer containers, sealing the container, and freezing. Unless they are tray packed (see below), they most likely will clump together and be difficult to separate into individual berries. Note: Dry blueberries completely after rinsing, or else the moisture on the blueberry skin will cause tougher skins.

A tray pack works well to help maintain the shape of each individual berry and keeps them easy to tray pack strawberriesremove from the container and separate from each other. This method is called a tray pack because after rinsing and completely drying the berries, you spread them in a single layer on a shallow tray (like a cookie sheet), then carefully lift the tray into the freezer without causing berries to touch each other. As soon as they freeze, seal the berries in an airtight container and place them back into the freezer so they don’t get freezer burn.

Okay, we know not every source recommends washing blueberries before freezing them. It is your choice; we just like them to be as clean as possible and completely ready-to-eat when it’s time to take them out of the freezer.  But, they do need to be completely dry before freezing for best quality.

A sugar pack is like a dry pack but with one extra step – gently mix ¾ cup sugar per 1 quart (1⅓ strawberries with sugarpounds) clean berries. Let sit a short time until the juice is drawn out and the sugar dissolved before filling into freezer containers, sealing, and placing in the freezer. You can view step-by-step directions and photos for a sugar pack by selecting the PowerPoint presentation under “Strawberries” on the National Center’s ‘Freezing’ page.

A syrup pack surrounds the berries in a sweetened liquid, changing the sweetness and texture of the berries quite noticeably. Based on the natural sweetness of the berries and your own preference, you can decide the proportion of sugar to water from very light syrup (10% sugar) to very heavy syrup (50% sugar). More tart berries may produce the most desirable flavor from using a 40%-50% syrup. Exact proportions for the range of syrups are listed on this Syrups chart, along with directions to make the syrup and notes about replacing part of the sugar with corn syrup or honey.

Crushed or puréed is an option for berries like blueberries and huckleberries that you might use an ingredient in other recipes. The berries can be crushed, pressed through a fine sieve or puréed in a blender or food processor. Mix 1 cup (or 1⅛ cups) sugar with each quart (2 pounds) of crushed or puréed berries.

If you add sugar to the berries before freezing (as in the sugar pack, syrup pack, or crushed/puréed), then label the container with exactly how much sugar you add, so that you can include that quantity as part of the amount of sugar called for on the ingredient list of your final product recipe.  If you know you will use your berries for a jam or other recipe, you can mix just the right amount of fruit and sugar together before freezing.

For all types of pack, remember to leave at least ½-inch headspace (more for some styles of pack; see chart for exact measurements) between the berries and the lid of each container so that the containers don’t break open while expanding in the freezer. Also make sure the sealing surfaces of your lid and bottom are completely clean and dry, if you don’t use a plastic bag. Any trapped food, sugar or syrup can expand when frozen and separate the tight seal that should be in place.


Freezing Fruits for Summer Smoothies

Springtime often brings warm sunshine, cool breezes, fresh fruits…and the opportunity to plan refreshing treats for the hot summertime ahead. Fruit smoothies in the summer are not only a welcomed way to cool down but are also nutritious, delicious, and easy to prepare. Due to the popularity of smoothies, recipes are easy to find; look online, on product packaging, and in books and magazines. Once you get the hang of it you’ll be making recipes of your own.

A medley of frozen fruits from our global food suppliers helps you mix-and-match a variety of flavors with fresh fruits and berries that will be ready for harvest later in the season. Fruits like bananas, pineapple, and mango are not typically grown in the United States, but are available year-round at grocery stores. These three fruits in particular add consistently tasty flavor and texture to smoothies. Keeping them frozen allows you to use them in smoothies as you would otherwise use ice cubes- but fruit “ice cubes” pack a lot more flavor than regular ice cubes!

Freezing these fruits for smoothies is simple:

–          Make sure your freezer is set to 0°F or below.

–          Select fruits that are mature, ripe, and at their peak of freshness.

–          Work under sanitary conditions; freezing does not destroy enzymes or kill microorganisms, it just slows their effects.

–          Peel fruits, remove cores or seeds as needed, then slice into chunks about the size of regular ice cubes.

Pieces of Fruit on Tray for Freezing

–          Enzymes may still cause browning of fruits, so you may want to add ascorbic acid, citric acid, or lemon juice before freezing. Refer to http://nchfp.uga.edu/how/freeze.html for exact quantities.

–          You might also want to place the fruit pieces on cookie sheets or trays to freeze them individually before packing them for storage. This step makes it easier to separate them for use.

–          Store the pieces of fruit in a rigid container or plastic bag that holds one half-gallon or less so that all pieces freeze fast enough to produce a satisfactory quality. Choose containers that are moisture-vapor resistant, durable, leak-proof, easy to seal, and easy to mark. Label with the type of fruit and date for easy identification.

OLYMPUS DIGITAL CAMERAFrozen Fruits in Rigid Containers

Depending on where you live and from where you get your fruit, you might already be seeing strawberries fresh off the vine. Sooner or later you might also have fresh peaches, raspberries, blueberries, and/or blackberries. Whatever your local flavor, having some frozen fruits stored in the freezer will allow you to blend a fresh, cold smoothie whenever you like!