Old Bachelors Jam

Directions

1. 1
   Bring blackberries, 1 3/4 cups sugar, and juice of 1 lemon to a simmer in a large pot.
2. 2
   Cook until sugar dissolves and berries are soft, 4 to 5 minutes.
3. 3
   Press a parchment round directly on surface of jam, and refrigerate overnight.
4. 4
   Repeat with raspberries and remaining 1 3/4 cups sugar and juice of 1 lemon in another large pot.
5. 5
   Remove parchment rounds; bring each pot to a boil.
6. 6
   Cook over medium-high heat until berries are slightly broken down and mixture is consistency of very loose jelly, about 12 minutes for blackberries and about 17 minutes for raspberries.
7. 7
   Divide blackberry jam among 4 half-pint glass jars, filling each halfway; top each with 1 tablespoon kirsch.
8. 8
   Divide raspberry jam among jars; top each with 1 tablespoon kirsch.