Prep Time 10 minutes
Cook Time 25–30 minutes
Cooling/Setting Time 2 hours (passive)
Total Time ~2 hours 40 minutes
Yield 3 half-pint jars (approx. 24 oz total)
Intensity (Effort) Medium
Intensity (Skill Level) Beginner-Intermediate
Difficulty Notes Requires monitoring for doneness; involves hot jars and a boiling water bath for canning.
🧾 Ingredients
6 cups fresh or frozen blueberries (about 2 lbs / 900g)
1 cup raw honey (mild-flavored like clover or wildflower; avoid strong buckwheat honey)
¼ cup fresh lemon juice (about 2 lemons)
1 teaspoon lemon zest (optional, but recommended for brightness)
¼ teaspoon unsalted butter (optional – reduces foaming)
🥣 Equipment
Large, heavy-bottomed pot (stainless steel or enameled cast iron)
Potato masher or immersion blender
Jar lifter or kitchen tongs
3 half-pint (8 oz) canning jars with new lids and bands
Canning funnel
Candy or deep-fry thermometer (optional but helpful)
Small plate (for the “wrinkle test”)
Water bath canner or a large deep pot with a rack
🔥 Instructions
Phase 1: Prep (Intensity: Low | 10 min)
Wash blueberries – Pick out stems or any soft/underripe berries. If using frozen, no need to thaw.
Prepare jars – Wash jars, lids, and bands in hot soapy water. Place jars in your canning pot, cover with water, and bring to a simmer (180°F). Keep them warm until ready to use. Place lids in a separate small bowl of hot (not boiling) water to soften the sealing compound.
Put a small plate in the freezer – You’ll use this later to test jam consistency.
Phase 2: Cook the Jam (Intensity: Medium | 25–30 min)
Combine ingredients – In your large pot, combine blueberries, honey, lemon juice, lemon zest, and butter (if using). Start over medium heat.
Crush berries – As the berries warm (about 2–3 minutes), use a potato masher to break them down. Leave some berries partially whole for a rustic texture, or mash thoroughly for a smoother jam.
Bring to a rolling boil – Increase heat to medium-high. Stir frequently to prevent sticking. Once the mixture reaches a boil that doesn’t stop when stirred, begin timing.
Boil gently – Reduce heat slightly to maintain a steady, moderate boil (about 220°F / 104°C if using a thermometer). Stir often. After 15 minutes, the jam will darken and thicken.
Skim foam – Use a metal spoon to remove any pinkish foam that rises (the butter helps minimize this).
Phase 3: Test for Doneness (Intensity: Medium | 2–3 min)
The “Wrinkle Test” (most reliable without pectin):
Remove pot from heat.
Take your chilled plate from the freezer.
Drop ½ teaspoon of jam onto the cold plate.
Return plate to freezer for 1 minute.
Push the jam with your finger. If it wrinkles and doesn’t run back together, it’s done. If it’s still runny, boil for 2–3 more minutes and retest.
Alternate test: The jam should coat the back of a metal spoon and slide off in a sheet, not individual drops.
Phase 4: Jar and Process (Intensity: High – Caution with heat | 15 min active + 10 min processing)
Ladle hot jam – Using a canning funnel, ladle jam into warm jars, leaving ¼-inch headspace. Wipe rims with a damp cloth. Apply lids and bands – fingertip tight (don’t over-tighten).
Water bath process – Place jars back into the canner with water covering them by 1–2 inches. Bring to a full boil. Process for 10 minutes (adjust for altitude: +5 minutes for 3,000–6,000 ft, +10 minutes above 6,000 ft).
Remove and cool – Turn off heat. Wait 5 minutes, then lift jars onto a towel-lined counter. Do not disturb for 12–24 hours. You’ll hear “ping” sounds as they seal.
✅ Checking the Seal
After cooling, press the center of each lid. If it doesn’t flex down, it’s sealed. Any unsealed jars should be refrigerated and used within 3 weeks.
⏳ Shelf Life & Storage
Storage Method Duration
Unopened, sealed jar in cool, dark pantry 12–18 months
After opening, refrigerated 3–4 weeks
Freezer (leave ½-inch headspace, no metal lids) 6 months
Note: Because this recipe uses honey instead of high-sugar pectin gels, the jam will be slightly softer than store-bought jam. That’s normal and delicious.
🥄 How to Use This Jam
Swirled into oatmeal or overnight oats
Thumbprint cookies with a jam center
Glaze for grilled chicken or pork (melt with a splash of vinegar)
Peanut butter + jam sandwich (elevated)
Topping for brie or goat cheese with crackers
🌿 Substitutions & Variations
Low-sugar version: Reduce honey to ¾ cup and add 1 tablespoon chia seeds after cooking (stir well; let sit 10 minutes to thicken).
Spiced blueberry jam: Add ½ teaspoon cinnamon and ¼ teaspoon cardamom with the berries.
Lavender honey jam: Infuse honey with 1 tablespoon dried culinary lavender (strain before adding to berries).
Frozen berries work great – just add 5 minutes to the boiling time to account for extra liquid.
📊 Nutrition Information
Per 1 tablespoon serving (approx. 20g)
Nutrient Amount
Calories 48 kcal
Total Fat 0.1 g
Saturated Fat 0 g
Trans Fat 0 g
Cholesterol 0 mg
Sodium 0.4 mg
Total Carbohydrate 12.5 g
Dietary Fiber 0.7 g
Total Sugars 11 g
Includes Added Sugars (from honey) 8 g
Protein 0.2 g
Vitamin C 3 mg (5% DV)
Manganese 0.1 mg (4% DV)
Vitamin K 3 mcg (3% DV)