Step 1

Place the berries in a saucepan over low heat. Stir and heat until they soften and release their juice.

Step 2

Mash the berries with a fork or potato masher. Remove the pan from the heat.

Step 3

Press the mixture one spoonful at a time through a fine mesh sieve to remove the seeds. Use the back of the spoon to press the berry mixture through. You should get about 3/4 cup juice.

Step 4

Mix 2 Tablespoons of the juice with the cornstarch.

Step 5

Place the rest of the blackberry juice in the pan with the honey. Slowly stir in the cornstarch mixture. Heat over medium heat until thickened. (about 4 minutes)

Step 6

Remove the pan from the heat and let cool before placing in a jar and refrigerating.