Harvard Farmers Market

vintage Sure-Jell photo from RecipeCurio.com

Strawberry Jam, taken from the Sure-Jell packet.  Tried and true.

Ingredients

2 quarts strawberries, cut and crushed to yield 5 cups crushed berries

7 cups sugar

1/2 tsp butter

1 box Sure-Jell powder

Directions:

Pour crushed berries into large boiler

Measure sugar into separate container and set aside.

Stir package of Sure-Jell into strawberries.

Add butter.

Bring berries and Sure-Jell to a full rolling boil, then add sugar.

Stir constantly.

Stir in sugar, quickly.

Return mixture to a full rolling boil and boil exactly 1 minute, stirring constantly.

Remove from heat.

Skim foam from top with metal spoon.

Ladle quickly into jars that have been cleaned and preheated.

Clean rims of jars with clean hot cloth.

Place heated lids (lids that have been placed in simmering water for 1 minute) on jars and tighten rings.

Turn jars upside down for five minutes to seal.

Return jars to upright position and let cool completely before storing.