Description

A deeply flavorful, soft-set blueberry jam made from just a handful of ingredients—ripe blueberries, sugar, and fresh lemon. This jam is perfect for morning toast, cheese boards, or swirled into yogurt. No pectin required, and ready in about an hour. Store it in jars and enjoy a taste of summer all year long.

Ingredients

Scale

4 cups fresh or frozen blueberries
1½ cups granulated sugar
2 tablespoons fresh lemon juice
1 teaspoon lemon zest (optional)
1 teaspoon unsalted butter (optional)

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Instructions

Rinse the blueberries and remove any stems or damaged fruit.
Place berries, sugar, lemon juice, and zest in a large saucepan.
Let sit for 10 minutes to allow juices to release.
Mash half of the berries using a potato masher for a mix of textures.
Bring mixture to a simmer over medium heat, stirring regularly.
Add butter to reduce foam (optional).
Cook for 30–40 minutes, stirring often, until it reaches 220°F or passes the wrinkle test.
Remove from heat and skim off any foam.
Let sit for 10–15 minutes before pouring into jars.
Seal jars and refrigerate or process for long-term storage.

Notes

Use the cold plate test to check for doneness: place a small spoonful on a chilled plate and push with your finger—if it wrinkles, it’s ready.

For a firmer texture, consider adding 1 tablespoon of powdered pectin at the beginning.

This jam tastes even better after resting overnight as the flavors deepen.

Prep Time: 10 minutes
Cook Time: 35 minutes
Category: Spreads & Preserves
Method: Stovetop
Cuisine: American

Nutrition

Serving Size: 1 tbsp
Calories: 45