Cuisine: The Polish Palate
Course: Preserves, Condiments
Diet: Vegan, Vegetarian, Gluten-Free, Low-Fat, Dairy-Free, Pescatarian
Occasion: Pantry Stock, Winter Preserves, Batch Cooking, Autumn Harvest, Culinary Heritage, BBQ

Keczup z Dyni (Pumpkin Ketchup)

A spiced, sweet-sour autumnal preserve that beats tomato ketchup hands down.
Prep time 45m
Marinate 2h
Cook time 1h 40m
Total 4h 25m
Yield
5
By Adam Dworak
Published: 03 January 2026
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Last Updated: 18 September 2026

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Ingredients

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Kitchen Kit

  • Large Heavy-Bottomed Pot
  • Stick Blender
  • Sterilised Jars
  • Peeler
  • Chef's Knife
  • Large Mixing Bowl
  • Tea Towel
  • Chopping Board
  • Fine Mesh Sieve
  • Digital Kitchen Scales
Pot of soup on a stove with ingredients and cups in the background | Cook & Keeper - Pumpkin ketchup

Method

  1. The Prep & Weigh-In
    Peel the pumpkin, scrape out the seeds, and chop the flesh into uniform 2cm cubes. Finely dice the brown onions to a 5mm gauge.
    Important Yield Ratio: To ensure the preservation chemistry remains stable, your prepared, cubed pumpkin flesh must equal exactly two-thirds of your total purchased pumpkin weight. For this standard recipe, that means extracting exactly 2kg of clean flesh from your 3kg whole pumpkin.
    Chef's Tip: You will likely have leftover flesh. Roast it for dinner; do not add it to the pot or the ketchup will be too weak.
  2. The Sweat
    Tip the weighed, cubed pumpkin and the diced onions into a large mixing bowl. Toss them thoroughly with the measured salt. Cover with a tea towel and leave them at room temperature for exactly 2 hours to extract their natural liquids.
  3. The Soften
    Transfer the pumpkin, onions, and all the salty, extracted brine into a large heavy-bottomed pot. Bring to a gentle simmer over medium heat (this usually takes 8–10 minutes), then cook until the pumpkin cubes are completely falling-apart soft. This takes approximately 30 minutes.
  4. The Blitz
    Remove from the heat. Using a stick blender or a high-speed jug blender, blitz the mixture until thoroughly puréed. For a truly professional, silky ketchup, pass this purée through a fine-mesh sieve back into the pot to eliminate any rogue fibres.
    Chef's Note: No lumps allowed. The smoother the purée now, the glossier the ketchup later.
  5. The Alchemy
    With the smooth purée back in the pot, add the caster sugar, white wine vinegar, tomato purée, and all the ground spices. Stir vigorously to combine.
  6. The Reduction
    Bring the thick mixture back to a gentle boil (approx. 5-7 minutes), then immediately drop the heat to low. Simmer for 45 minutes to reduce and thicken.
    Chef's Note: It will spit like molten lava, so keep a lid partially on (slightly askew). Stir frequently to prevent the concentrated sugars from catching on the bottom.
  7. The Jarring
    Taste for balance—it should be sharp, sweet, tangily acidic, and spicy. Ladle carefully into hot, sterilised jars and seal immediately. Invert the jars for 10 minutes to sterilise the lids, then let them cool upright.
Chef's Note & Storage
Cool dark place for 6 months. Fridge once opened.
00:00
Jars of homemade pumpkin ketchup on a wooden counter with a rustic kitchen background. | Cook & Keeper - Pumpkin ketchup

The Autumn Pantry King

Forget that sugary red sludge in the plastic squeezy bottle. In Poland, when the leaves turn brown and the markets are flooded with orange gourds, we make Keczup z Dyni. It is a revelation. It bridges the gap between a chutney and a sauce—silky smooth, vibrant orange, and humming with warmth from ginger, cinnamon, and curry powder.

This isn't just for chips. It cuts through the fat of a pork chop, livens up a cheese toastie, and is absolutely essential on a sausage. It requires a bit of elbow grease to peel the pumpkin, but one afternoon of work stocks your pantry for the entire winter. Use a proper culinary pumpkin or a butternut squash; do not bother with those watery, flavourless monsters grown for Halloween carving. We want dense, sweet flesh here.

Chef's Secret: Do not skip the maceration step. Salting the pumpkin and onions draws out the excess water, which concentrates the natural sugars and flavour before you even turn on the hob. If you rush this, you'll end up with pumpkin soup, not ketchup.

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The Texture Game

The difference between a rustic relish and a proper ketchup is the blender. You want to blitz this mixture until it is frighteningly smooth. Once blended, it returns to the pot. This is where you must be vigilant—it will spit like molten lava as it thickens. Keep the lid slightly askew and the heat low. You are looking for a glossy sheen and a consistency that holds its shape on a spoon.

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Cook’s Notes & Discussion

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