Session 214 — Fruit Preserves and Jam
← Block 41–42: Fermentation & Preservation Overview
Skill: Pectin activation; gel point testing; jar sterilization; headspace management Read first: Strawberry Jam
What you're learning: Jam is fruit + sugar + acid + heat, relying on naturally occurring pectin (or added pectin) to gel. The gel point is 220°F at sea level — use a thermometer or the plate test (drop a spoonful on a cold plate; if it wrinkles when pushed, it's done). Sugar is not just sweetness — it's a preservative and a textural agent. Too little sugar and you get compote; too much and you get candy.
Full Meal: - Fresh jam on brioche toast (callback to Block 45–46) or fresh biscuits - Make two batches: one classic (strawberry), one seasonal (whatever fruit is at the market this week)
🎥 Compare Notes: The Easiest Way To Make Any Homemade Fruit Jam — Joshua Weissman — Watch Joshua's approach to sugar ratios, gel point testing, and how he adapts the method for different fruits.