Go Back
–+ servings
A glass mason jar brimming with dark purple Homemade Blackberry Jam featuring tiny seeds and cooked fruit chunks, beside fresh berries.
FL Recipes

Outstanding Homemade Blackberry Jam for Artisan Toast

Master the art of perfect fruit preserves with this thick, glossy Homemade Blackberry Jam. Featuring visible fruit chunks and tiny seeds, this dark purple spread is perfect for smearing on golden-brown toasted artisan bread.
Print Recipe Pin Recipe WhatsApp
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings: 16 tablespoons
Course: Breakfast, Condiment
Cuisine: American
Calories: 160
Ingredients Equipment Method Nutrition Notes

Ingredients
  

Blackberry Jam Base
  • 4 cups fresh blackberries whole and washed
  • 3 cups granulated white sugar essential for pectin bonding
  • 2 tbsp fresh lemon juice squeezed from a bright yellow lemon wedge
  • 0.5 tsp unsalted butter used as a defoamer

Equipment

  • 1 Heavy-bottomed pot Essential for even heat distribution.
  • 1 Candy Thermometer Crucial for accurately hitting 220°F (105°C).
  • 2 8-ounce Clear Glass Mason Jars Must be sterilized before filling.

Method
 

Stovetop Jam Making
  1. Combine the fresh blackberries and granulated sugar in a heavy-bottomed pot. Let sit at room temperature for 30 minutes to draw out the natural juices.
  2. Place the pot over medium heat, add the fresh lemon juice and butter. Stir until the sugar dissolves, gently mashing half of the berries while leaving the rest intact.
  3. Increase the heat to medium-high to achieve a vigorous rolling boil. Stir continuously to prevent burning on the bottom of the pot.
  4. Boil until a candy thermometer reads exactly 220°F (105°C), which takes about 15 to 20 minutes. The mixture will become thick, glossy, and dark purple.
  5. Ladle the hot jam into sterilized clear glass mason jars, leaving a 1/4 inch space at the top. Seal tightly and cool at room temperature for 24 hours.

Nutrition

Calories: 160kcalFiber: 2g

Notes

Tip 1: Perform the cold plate test by dropping a small amount of hot jam onto a frozen plate. If it wrinkles when nudged, it has reached the perfect set.
Tip 2: Do not skip the unsalted butter; it is the culinary secret to eliminating cloudy foam.
Keyword Blackberry Preserves,Homemade Blackberry Jam,Mason Jar Jam

Tried this recipe?

Let us know how it was!
Pin Recipe