Ingredients
Equipment
Method
Instructions
- Wash and hull the strawberries. Slice them into roughly 1/2-inch pieces. Zest the lemon (if using) before juicing.
- In a large saucepan, combine strawberries, sugar, lemon juice, lemon zest (if using), and butter (if using). Stir gently to combine.
- Bring the mixture to a boil over medium-high heat, stirring frequently to prevent sticking.
- Reduce heat to medium-low, and continue stirring occasionally. If using pectin, add it according to package directions.
- Cook for 10-15 minutes, or until the jam reaches setting point (see notes for testing).
- Ladle the hot jam into sterilized jars, leaving 1/4 inch headspace. Wipe rims clean, seal with lids and rings.
- Process in a boiling water bath for 10 minutes (optional, for longer shelf life). Cool completely; check seals.
- Store sealed jars in a cool, dark place. Refrigerate unsealed jars.
Notes
To test for setting point: Place a small amount of jam on a chilled plate. Let it cool slightly. Push the jam with your finger; if it wrinkles, it's ready. A jam thermometer should read 220°F (104°C).