Making jam at home doesn't have to be complicated task. Follow the recipe below for an easy take on strawberry jam.
Prepare waterbath preserving pot or stockpot and jars.
Combine crushed strawberries in a large saucepan. Gradually stir in Ball® RealFruit™ Pectin or another brand of Real Fruit Pectin. Add butter, if using. Bring mixture to a full rolling boil that cannot be stirred down, over high heat, stirring constantly.
Add entire measure of sugar, stirring to dissolve. Return mixture to a full rolling boil. Boil hard 1 minute, stirring constantly. Remove from heat. Skim foam, if necessary.
Ladle hot jam into hot jars, one at a time, leaving 1/4 inch (0.5 cm) headspace. Wipe rims. Center lids on jars. Apply bands and adjust to fingertip tight.
Process filled jars in boiling water for 10 minutes. Remove pot lid. Wait 5 minutes, then remove jars, cool and store up to 1 year.