Strawberry Freezer Jam 8 cups (2 L ) strawberries, hulled 1 box (49 g) light pectin crystals 3-1/4 cups (800 mL ) granulated sugar Preparation In large bowl and using potato masher, crush strawberries, 1 cup (250 mL) at a time, to make 4 cups (1 L). In small bowl, whisk pectin crystals with 1/4 cup (50 mL) of the sugar. Add to strawberries and stir to combine; let stand for 30 minutes. Add remaining sugar and stir until sugar dissolves, about 3 minutes. Pour into six 1-cup (250 mL) airtight containers, leaving 1/4-inch (5 mm) headspace. Cover with lids. Let stand undisturbed at room temperature until set, about 24 hours. Refrigerate for up to 3 weeks or freeze for up to 8 months.