This pineapple jam is a soft, glossy preserve made from 4 cups of chopped fresh pineapple, 2 to 2 ½ cups of sugar and 2 tablespoons of lemon juice, with no pectin. It simmers for 25 to 35 minutes, takes about an hour from start to finish, and makes 3 to 4 cups.
The trick is knowing when to stop. Pull it off the heat when a drop on a cold plate wrinkles, while the jam still looks a little loose in the pot, and it stays bright and spreadable instead of turning into candy.
Pineapple Jam Ingredients and the Ratio
- Fresh pineapple: 4 cups, finely chopped, which is about 1 large pineapple
- Granulated sugar: 2 to 2 ½ cups. Start with 2 and taste near the end.
- Fresh lemon juice: 2 tablespoons, for acid and a clean finish
- Lemon zest: 1 tablespoon, optional, for a sharper edge
- Vanilla extract: 1 to 2 teaspoons, optional, stirred in off the heat
The ratio is easy to remember: about 1 cup of sugar for every 2 cups of chopped pineapple, plus a splash of lemon. Sugar is part of the set here, not only the sweetness, so cutting it far below 2 cups gives a runnier jam that keeps for less time.
Choose a fully ripe pineapple with golden skin and a sweet smell at the base. Since there are only a few ingredients, a dull, sour fruit gives a dull jar. If you want a tarter jam to spread inside a cake, stay with 2 cups of sugar and add the zest.
Chunky or Smooth: Cutting the Pineapple
Peel the pineapple, cut out the woody core and chop the flesh into small pieces, roughly the size of a pea. For a chunky preserve with soft bits of fruit, leave it like that. For a smooth jam that spreads thinly on toast or pipes into cookies, pulse the chopped fruit a few times in a food processor. Stop before it turns to purée, or it can spit and splatter in the pot.
Keep every drop of juice that runs onto the board. It goes into the pot with the fruit.
How to Cook Pineapple Jam, Step by Step
Put the pineapple, sugar, lemon juice and zest in a large, heavy bottomed pot and stir. Leave it for 15 to 20 minutes. The sugar pulls juice out of the fruit and starts to dissolve, so it is less likely to catch when the heat goes on.
Set the pot over medium heat and stir until the sugar has fully dissolved and you no longer hear it scratch on the bottom. When it starts to simmer, turn the heat down slightly so it keeps a steady, gentle boil. Cook for 25 to 35 minutes, stirring often.
You will see it change. The bubbles start small and quick, then get bigger and slower as the water cooks off. The color goes from pale yellow to a deeper gold, and the fruit pieces turn glossy and translucent. Lift off any pale foam that collects at the edges with a spoon.
In the last 10 minutes, stir the bottom of the pot steadily. That is when pineapple sugar scorches, and even a little burnt layer flavors the whole batch.
The Cold Plate Test for Doneness
Put a small plate in the freezer when you start cooking. To test, take the pot off the heat, drop a teaspoon of jam onto the cold plate and wait 30 seconds. Push your finger through it. If the surface wrinkles slightly and the line holds without filling back in, the jam is ready.
If it runs back together, return the pot to the heat for another 5 to 10 minutes and test again. With a thermometer, the set point is about 220°F (104°C) at sea level. Once it passes, take it off the heat and stir in the vanilla if you are using it.
Why It Sets Soft Without Pectin
Pineapple has very little natural pectin, and this recipe does not add any. The jam thickens because boiling drives off water until the sugar and fruit are concentrated enough to hold together. The lemon juice adds acid, which helps that set and keeps the flavor from tasting flat.
That is why a good pineapple jam is soft and spoonable rather than firm like a boxed pectin jam. It also firms up quite a bit as it cools and again in the fridge, so judge it by the plate test, not by how thick it looks while it is bubbling.
Thicker Pineapple Jam for Tarts and Cake Filling
For pineapple tarts, filled cookies, or a layer that should not soak into a sponge, keep cooking past the plate test. Lower the heat and stir constantly. In another 10 to 20 minutes it turns into a thick, deeper golden paste with a light caramel flavor. It is ready when a spoon dragged across the bottom leaves a trail that stays open and the jam starts pulling away from the sides of the pot.
Let it cool completely before rolling it into balls or spreading it. If you want a creamier pineapple layer between cakes instead, use my pineapple cake filling, and for a whole cake built around the fruit, try the tropical pineapple coconut cake.
When the Jam Stays Runny or Catches on the Bottom
- Still runny after cooling: it came off the heat too early. Pour it back into the pot, boil for 5 minutes and do the plate test again.
- Too stiff or sticky: it cooked too long. Warm it with 2 to 3 tablespoons of water or pineapple juice and stir until it loosens.
- Burnt taste: the bottom scorched. Pour the jam into a clean pot without scraping the bottom of the old one. If the whole batch tastes burnt, it cannot be saved.
- Too sweet or flat: stir in another teaspoon or two of lemon juice. Next time, start with 2 cups of sugar.
- Cloudy with foam: skim it off before filling the jars. A tiny pat of butter stirred in at the end also calms the foam.
How Long Pineapple Jam Keeps
Ladle the hot jam into clean, sterilized jars, leave a little headspace at the top, and let them cool completely at room temperature before you put the lids on and refrigerate them. Kept in the fridge, it lasts up to 3 weeks. Use a clean spoon every time.
For longer storage, freeze it in freezer safe containers with about ½ inch of room for it to expand, for up to 6 months. Shelf stable jars need a water bath, and for that, follow tested home canning guidelines for the processing time and jar size.
From Toast to Thumbprints
It is lovely on buttered toast, warm sour cream biscuits and sour cream scones. Swirl a spoonful into plain yogurt, or spoon it over cheesecake as a quick topping.
In baking, the smooth version is a natural fit for cream cheese thumbprint cookies and heart jam thumbprint cookies, and the thicker version works as a cake or bar filling. If you like making fruit preserves, the apricot jam and homemade orange jam use the same cook down and plate test method.
Pineapple Jam Recipe
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Every recipe on this site can be converted to gluten-free, vegan, dairy-free, keto, nut-free or egg-free with adjusted ratios so nothing falls flat.
Try the Recipe Converter →This pineapple jam is a soft, glossy homemade preserve made with fresh pineapple, sugar, lemon juice and an optional touch of lemon zest and vanilla, with no pectin. It takes about an hour and makes 3 to 4 cups, with a bright, tangy pineapple flavor and a spoonable texture that can be chunky or smooth. The fruit rests with the sugar first, then simmers for 25 to 35 minutes until a drop on a cold plate wrinkles, so the jam sets by reduction alone. Use this fresh pineapple jam recipe on toast, biscuits and scones, in thumbprint cookies, as a cake filling or cheesecake topping, or cook it thicker for pineapple tarts. Keep it in the fridge for up to 3 weeks or freeze it for up to 6 months.
Ingredients
- 4 cups fresh pineapple, finely chopped (about 1 large pineapple)
- 2 to 2 ½ cups granulated sugar, adjusted to taste
- 2 tablespoons fresh lemon juice
- 1 tablespoon lemon zest (optional)
- 1 to 2 teaspoons vanilla extract (optional)
Instructions
PREPARE THE PINEAPPLE: Peel the pineapple, remove the core, and chop the flesh into small pieces. For a smoother texture, pulse the chopped pineapple briefly in a food processor. For a chunkier jam, leave small pieces intact.
COMBINE THE INGREDIENTS: Place the chopped pineapple, sugar, lemon juice, and lemon zest in a large heavy-bottomed pot. Stir until evenly mixed. Let the mixture rest for 15 to 20 minutes to draw out the natural juices from the fruit.
COOK THE JAM: Set the pot over medium heat and stir frequently until the sugar fully dissolves. Once the mixture begins to simmer, reduce the heat slightly to maintain a steady gentle boil. Cook for 25 to 35 minutes, stirring often to prevent sticking or scorching. The mixture will bubble and gradually thicken as excess moisture evaporates.
TEST FOR DONENESS: Place a small spoonful of jam on a chilled plate. Let it sit for about 30 seconds, then run your finger through the center. If the surface wrinkles slightly and the line holds its shape without quickly filling in, the jam is ready. If it remains thin, continue cooking for 5 to 10 more minutes and test again.
FINISH AND STORE: Remove the pot from the heat and stir in the vanilla extract, if using. Carefully pour the hot jam into sterilized jars, leaving a small amount of headspace. Allow the jars to cool completely at room temperature before sealing and refrigerating.
Notes
Use fully ripe pineapple with golden skin and a sweet aroma at the base for the best flavor.
Start with 2 cups of sugar and adjust after tasting during cooking if a sweeter jam is desired.
Pineapple is low in pectin, so the jam sets by cooking down. It is ready when a spoonful on a frozen plate wrinkles after 30 seconds, or at about 220°F (104°C) at sea level. It firms more as it cools.
Stir the bottom of the pot constantly in the last 10 minutes; pineapple sugar scorches easily.
For pineapple tarts or a thick cake filling, keep cooking on lower heat, stirring, until a spoon leaves an open trail on the bottom of the pot.
Store refrigerated jam for up to 3 weeks, or freeze for up to 6 months. For shelf storage, process in a water bath following safe, tested canning guidelines.
