Ingredients:
- 4 cups (about 900g) ripe grapes, stems removed and thoroughly washed
- 1 cup (200g) granulated sugar
- 1/4 cup (60ml) fresh lemon juice (about two lemons)
- 1/2 teaspoon ground cinnamon (optional)
- 1 packet (1.75 oz or 49g) fruit pectin (like Sure-Jell)
Instructions:
- Wash grapes and remove stems. Crush the grapes using a potato masher or fork to release juices.
- In a large pot, combine crushed grapes, lemon juice, and sugar. Heat over medium until sugar dissolves, stirring occasionally.
- Stir in the fruit pectin and cinnamon (if using). Bring the mixture to a full boil; cook for 10-15 minutes until it thickens.
- Use a spoon to check consistency—mixture should coat the back of the spoon.
- Remove from heat and let cool for a few minutes. Using a funnel, fill sterilized jars with jam, leaving 1/4 inch headspace.
- Wipe jar rims, seal with lids, and process in a boiling water bath for 5-10 minutes.
- Remove jars and let cool completely on a wire rack. Ensure lids pop down to indicate a proper seal.