Strawberry Banana Jam: A Taste of Sunshine in Every Jar

There’s a memory etched in my mind from summers spent at my grandmother’s farm: the sweet, heady aroma of bubbling fruit simmering on the stove. Every year, she’d make an enormous batch of strawberry jam, a vibrant ruby concoction that tasted of sunshine and pure joy. One particularly memorable year, a playful experiment led to the addition of ripe bananas, creating a surprisingly delightful twist that became a family favorite. That strawberry banana jam, with its unexpected tropical note, is a jar of pure nostalgia.

Recipe Overview

• Prep Time: 30 minutes
• Cook Time: 20 minutes
• Total Time: 50 minutes
• Yields: 4-6 half pints
• Dietary Type: Vegetarian

Ingredients

• 2 quarts strawberries (cleaned and mashed)
• 3 tablespoons lemon juice
• 1 (1.75 ounce) box powdered Sure-Jell
• 3 bananas (mashed)
• 6 3/4 cups granulated sugar
• 1/2 teaspoon butter (optional, see note below)

Ingredient Notes: The butter is optional, but it helps to reduce foaming during the cooking process. If you are vegan, you can omit it or use a vegan butter substitute. Be sure to use ripe, but not overripe, bananas for the best flavor and texture. Overripe bananas will result in a darker jam and a more pronounced banana flavor that can overpower the strawberries.

Equipment Needed

• Large saucepan or stockpot
• Wooden spoon or heat-resistant spatula
• Measuring cups and spoons
• Potato masher or fork
• Sterilized canning jars with lids and rings
• Jar lifter (optional, but highly recommended)
• Ladle
• Wide-mouth funnel (optional, but helpful)

Instructions

1. Prepare the Fruit: Thoroughly wash and hull the strawberries. Place them in a large bowl and mash them using a potato masher or a sturdy fork. You should have about 4 cups of mashed strawberries.
2. Combine Initial Ingredients: In a large saucepan or stockpot, combine the mashed strawberries and lemon juice. The lemon juice helps to balance the sweetness and acts as a natural preservative.
3. Add Pectin and Butter: Stir in the Sure-Jell (fruit pectin) and butter (if using). The Sure-Jell is essential for helping the jam thicken properly. Make sure to thoroughly incorporate the pectin to prevent clumping. The butter is optional but will help reduce foaming during cooking.
4. Bring to a Rolling Boil: Place the saucepan over medium-high heat and bring the mixture to a full rolling boil, stirring constantly. A full rolling boil is defined as a boil that continues even when stirred. This is important for activating the pectin.
5. Add Sugar: Once the mixture reaches a rolling boil, quickly add the sugar, all at once.
6. Return to Full Boil: Continue stirring constantly and return the mixture to a full rolling boil. Boil hard for exactly 1 minute, stirring constantly to prevent scorching. Accurate timing is crucial for proper setting of the jam.
7. Add Bananas: Remove the saucepan from the heat and gently fold in the mashed bananas until they are evenly distributed throughout the jam. Be careful not to overmix.
8. Remove From Heat: Remove from the heat.
9. Prepare Jars: While the jam is cooking, ensure your canning jars, lids, and rings are sterilized. There are several methods for sterilizing jars. You can boil them in a large pot of water for 10 minutes, run them through a hot cycle in your dishwasher, or bake them in the oven at 225°F (107°C) for 10 minutes. Keep the jars hot until you are ready to fill them.
10. Fill Jars: Using a ladle and a wide-mouth funnel (if desired), carefully fill the hot, sterilized jars with the hot strawberry banana jam, leaving about 1/4 inch of headspace at the top of each jar.
11. Remove Air Bubbles: Gently tap the jars on the countertop to release any trapped air bubbles. You can also use a non-metallic spatula or utensil to run along the inside of the jar to release any air bubbles.
12. Wipe Rims: Wipe the rims of the jars clean with a damp cloth to ensure a good seal.
13. Place Lids and Rings: Place the sterilized lids on the jars, and then screw on the rings until they are fingertip tight. Do not overtighten the rings, as this can prevent the jars from sealing properly.
14. Invert Jars: Carefully invert the filled and sealed jars. Let the jars sit inverted for at least 5 minutes, or up to 2 hours. This method helps to create a vacuum seal, which is essential for long-term storage. Listen for a “pop” sound, which indicates that the lid has sealed.
15. Check for Seal: After the jars have cooled completely, check the seals by pressing down on the center of each lid. If the lid doesn’t flex or give, it is properly sealed. If the lid flexes, the jar didn’t seal properly, and the jam should be refrigerated and used within a few weeks.

Expert Tips & Tricks

• Don’t Overcook: Overcooking the jam can result in a tough, rubbery texture. Stick to the recommended cooking time for the best results.
• Use a Candy Thermometer: For extra assurance, use a candy thermometer to check the setting point of the jam. It should reach 220°F (104°C). However, be aware that altitude can affect the setting point.
• Foam Control: If excessive foam forms during cooking, skim it off the top with a spoon before filling the jars. The butter helps minimize this, but skimming may still be necessary.
• Jelly Test: If you’re unsure if the jam is ready, perform the “jelly test.” Place a small spoonful of hot jam on a chilled plate. Let it cool for a minute or two. Then, push the jam with your finger. If it wrinkles, it’s ready. If it’s still runny, continue cooking for a few more minutes and test again.

Serving & Storage Suggestions

Serve this delightful strawberry banana jam on toast, biscuits, scones, or muffins. It’s also a fantastic addition to yogurt, oatmeal, or pancakes. You can even use it as a glaze for cakes or pastries.

Properly sealed jars of strawberry banana jam can be stored in a cool, dark place (like a pantry) for up to a year. Once opened, the jam should be refrigerated and consumed within a few weeks. If you have any unsealed jars, refrigerate them immediately and use them within a few weeks. Freezing is not recommended as it can affect the texture of the jam.

Nutritional Information

Please note that these are estimates and can vary based on specific ingredients and portion sizes.

Nutrient	Amount per Serving	% Daily Value
Calories	250 kcal	13%
Total Fat	0.5g	1%
Saturated Fat	0.1g	1%
Cholesterol	0mg	0%
Sodium	5mg	0%
Total Carbohydrate	60g	20%
Dietary Fiber	2g	7%
Sugars	55g	N/A
Protein	1g	2%

Variations & Substitutions

• Spice It Up: Add a pinch of ground cinnamon or nutmeg for a warm, spicy twist.
• Citrus Zest: Grate the zest of one lemon or orange into the jam for a brighter, more complex flavor.
• Tropical Fusion: Incorporate other tropical fruits like mango or pineapple for a unique and exotic jam.
• Reduce Sugar: For a lower-sugar jam, use a sugar substitute specifically designed for jam making, following the manufacturer’s instructions. Note that this may affect the setting time.

FAQs (Frequently Asked Questions)

Q: Why is my jam not setting?
A: Several factors can prevent jam from setting properly, including insufficient pectin, not boiling the mixture long enough, or incorrect sugar ratio. Make sure to use fresh pectin and follow the recipe instructions carefully.

Q: Can I use frozen strawberries?
A: Yes, you can use frozen strawberries, but be sure to thaw them completely and drain off any excess liquid before mashing them. This will help prevent the jam from being too watery.

Q: Do I need to sterilize my jars?
A: Yes, sterilizing the jars is crucial for ensuring a safe and long-lasting seal, preventing spoilage.

Q: Can I use a different type of pectin?
A: Yes, but be sure to follow the instructions on the pectin package, as different types of pectin may require different amounts of sugar or cooking times.

Q: How long will the jam last?
A: Properly sealed jars of strawberry banana jam can last up to a year in a cool, dark place. Once opened, refrigerate and use within a few weeks.

Final Thoughts

There’s something deeply satisfying about creating your own jam, transforming simple ingredients into a jar of pure deliciousness. This strawberry banana jam is more than just a recipe; it’s a taste of summer, a touch of nostalgia, and a testament to the magic that happens when you experiment in the kitchen. I encourage you to give it a try and experience the joy of homemade jam. Don’t be afraid to put your own spin on it and make it your own. Enjoy!