Ingredients :

• Apples (1 kg, very ripe) — This is the single ingredient that matters. Golden Delicious, Reine des Reinettes, or Boskoop — all three work well, but in different ways. Golden is sweet and melts fast, perfect if you want something very smooth. Boskoop is more acidic and slightly fibrous; mixed with a Golden, it adds character. Reine des Reinettes is the most balanced if you don’t want to overthink it. Avoid Granny Smith alone in a sugar-free version — its acidity can’t be corrected without sweetener. The test before buying: press your thumb near the stem. If the apple gives slightly without bruising and releases a fruity scent at room temperature, it’s ready.
• Cinnamon stick — One single stick for 1 kg of apples is the right amount. Powdered cinnamon burns and becomes bitter during cooking — stick to the whole stick and remove it before blending. Ceylon rather than Cassia if you have the choice: sweeter, less spicy, it pairs better with the natural fructose of the apples without masking it.
• Lemon (half, juice only) — Not at the start of cooking. This is the most common and least visible error in online recipes. Citric acid slows down the breakdown of pectin and delays the release of fructose — result: a sauce perceived as acidic even though the apples were good. Added off the heat, the same half-lemon does exactly what is asked: set the amber color without interfering with the sweetness.
• Vanilla powder — A pinch, no more. It rounds everything out without being explicitly identifiable — that’s its role here. If you don’t have any, a half scraped pod in the pot works even better.