Cognac Marmalade

About this recipe

A single-pot bitter-orange marmalade with pronounced cognac and vanilla finish. A cold salt soak replaces traditional blanching to reduce bitterness without sacrificing aromatic oils.

Cognac is added in two stages — a small amount early with the sugar to embed oak and vanillin, the bulk off-heat with vanilla extract to preserve fresh grape-floral top notes. Flavour peaks at 3–4 weeks of rest.

Ingredients

• 3 kg organic oranges (bio, unwaxed)
• 2 lemons
• 2 L water (for maceration and cooking)
• 1½ tbsp fine sea salt (for the cold peel soak)
• 2.6 kg granulated sugar
• ¾ tsp citric acid
• 150 ml cognac (mid-range or better)
• 1 tbsp natural vanilla extract
• ½ tsp fine sea salt (for finishing)

About the cognac split: 35 ml goes in early (before sugar) to embed oak and caramel notes into the peel. The remaining 115 ml goes in off-heat at the end, together with the vanilla extract, to preserve the bright grape-floral top notes and the clean vanilla aroma. Use real vanilla extract — not synthetic essence — the ingredient list should read vanilla beans, alcohol, water (maybe sugar).

Equipment

• One large non-reactive pot (stainless steel, minimum 6 L, ideally heavy-based)
• Sharp knife
• Muslin or cotton tea towel
• Kitchen string
• Citrus juicer
• Wooden spoon
• Candy thermometer (strongly recommended)
• 14 × 370 ml sterilized jars with new lids
• 3 small plates chilled in the freezer for set testing

Method

1. Juice and collect pips

Halve all the oranges and the 2 lemons across the equator. Juice them into a large non-reactive bowl. As you juice, scoop every pip and loose membrane into a square of muslin or clean cotton cloth. Reserve the juice. Tie the muslin bundle tightly with kitchen string once done — this is your pectin bomb.

2. Scrape the pith (~25 min)

Take each hollowed-out orange half and use a spoon to scrape out the thick white spongy pith from the inside, leaving only 2–3 mm of pith still attached to the colored peel. Add the scraped pith to the muslin bundle (re-tie if needed). This removes the main bitterness load while keeping the pips' and membranes' pectin.

3. Slice the peel

Slice the scraped peel halves into strips — 3–4 mm thick, 3–4 cm long for classic chunky marmalade, or 2 mm for finer shreds.

4. Cold salt soak the peel (8-10 hours)

Put the sliced peel in a large non-reactive bowl. Dissolve 1½ tbsp fine salt in 1.5 L of cold water, pour over the peel. Cover and leave at room temperature. After 4–5 hours, drain, rinse briefly under cold water, and refill with fresh cold water (no salt this time). This draws out bitter compounds without heat damage to the aromatic oils.

5. Macerate juice and pip bundle overnight (8-10 hours)

In a separate bowl, combine the reserved juice, 2 L water, and the pip-and-pith muslin bundle. Cover. Leave at room temperature overnight alongside the salt-soaking peel. This extracts pectin from the pips, membranes, and scraped pith into the liquid — replacing what the salt soak might cost you.

6. Combine in the pot

Next morning: drain the peel well and rinse briefly. Transfer the peel and the macerated juice-water-pip-bundle mixture into your large pot.

7. First boil — soften the peel (45-60 min)

Bring to a gentle simmer. Cook uncovered at a gentle bubble for 45–60 minutes — shorter than a cold-start recipe because the peel is pre-softened by the salt soak. Peel should squash easily against the side of the pot.

8. Squeeze and discard the pip bundle (5 min)

Remove the pip bundle with tongs, cool 5 min, then squeeze HARD back over the pot — jelly-like pectin will ooze out. Squeeze until dry. Discard the bundle.

9. First cognac addition

Off heat: stir 35 ml of cognac into the pot. This embeds oak and caramel notes into the peel before sugar goes in.

10. Add sugar and citric acid, dissolve fully (3-5 min)

With the pot still off heat, add 2.6 kg sugar and ¾ tsp citric acid. Stir patiently with a wooden spoon until every sugar crystal has dissolved — no grittiness when you tilt the spoon. Rushing this burns the bottom.

11. Rolling boil to setting point (15-25 min)

Return to high heat and bring to a full rolling boil that doesn't stop when you stir. Boil hard 15–25 minutes, stirring occasionally. Skim foam as it rises. Start testing at 15 minutes: candy thermometer reading 105.5°C, OR wrinkle test on a frozen plate that holds shape for 45–60 seconds when pushed.

12. Second cognac addition + vanilla (1 min)

Once you hit setting point, kill the heat. Wait 60 seconds for the boil to subside completely, then stir in 115 ml cognac, 1 tbsp vanilla extract, and ½ tsp finishing salt. Adding vanilla off-heat preserves its full aroma — boiling vanilla extract for even 30 seconds strips most of its character.

13. Rest before jarring (8-10 min)

Let the pot rest undisturbed for 8–10 minutes. This lets the peel distribute evenly through the syrup instead of floating to the top of your jars. Give one gentle stir before jarring.

14. Jar, seal, invert

Ladle hot marmalade into warm sterilized jars, leaving 5 mm headspace. Wipe rims clean with a cloth dipped in hot water. Seal immediately with hot lids. Invert each jar for 2 minutes to sterilize the lid interior, then turn upright. Label with the date. Leave undisturbed 24 hours to set fully.

15. Check seals and store

After 24 hours, check every lid — it should not pop when pressed in the center. Any unsealed jars go in the fridge to eat first. Sealed jars keep 12+ months in a cool dark pantry. Best flavor develops at 3-4 weeks of rest.

Notes & Troubleshooting

Why the cognac split (35/115)

The early 35 ml gets briefly cooked with the sugar, embedding oak and vanillin into the peel structure. The late 115 ml goes in off-heat to preserve the fresh grape-floral top notes. Net effect: layered cognac character, slightly reduced alcohol load on the pectin set.

Why vanilla extract, not pod

Extract goes in off-heat alongside the cognac — the alcohol bases are compatible and both preserve their volatile aromatics this way. A pod would need to steep during the first boil, which is more work and, for this recipe, no flavour advantage. Use real extract, not synthetic essence.

Temperature target

105.5°C for setting. A candy thermometer is worth the small investment — with ~5.7% booze load, eyeballing is risky. Aim for firm set rather than soft.

If the set is sluggish

Past 25 min rolling boil, add juice of half a lemon and ½ tsp more citric acid, boil 3 more min. If still slow, accept a slightly looser set — overcooking kills flavour worse than soft set does.

Storage

Sealed jars: 12+ months in cool dark pantry. Flavour peaks at 3–4 weeks of rest as the cognac and vanilla integrate. After opening: refrigerate, use within 6 weeks.

Pairing ideas

• Salted butter on sourdough (the default)
• Goat cheese or aged sheep's milk cheese
• Glazing roasted carrots or parsnips
• Stirred into a bitter-orange vinaigrette with olive oil and Dijon
• Spooned over yoghurt with black pepper
• Folded into buttercream for a citrus cake filling