Orange Marmalade

This is the kind of orange marmalade your great-grandmother might have made: thin-sliced unpeeled fruit soaked overnight, simmered hard, then cooked in small batches with sugar until it sets to a glassy amber jelly. The whole rinds (pith and all) are essential. They release the natural pectin that makes the marmalade jell without commercial pectin packets.

The 24-hour soak is the patience step. After hard-boiling the sliced oranges and lemons for an hour to halve the volume, the fruit rests overnight to soften the peel and develop the marmalade’s signature bitter-sweet edge. Skipping this step leaves the rind chewy in the finished jar.

Cooking in 4-cup batches is the move that produces a brighter color and a cleaner set. Larger batches scorch on the bottom or take so long to come up to gel point that the marmalade darkens. Three-quarters cup of sugar per cup of fruit is the classic ratio.

Pro Tips

• Slice the fruit as thinly as possible. Thick slices stay tough even after the long simmer.
• Use a wide, heavy-bottomed pan. Surface area helps evaporation and prevents scorching.
• Test for set with the cold-plate trick: chill a small plate, drop a teaspoon of marmalade on it, push with a finger. If it wrinkles, it’s done.
• If the first batch refuses to set quickly, the fruit needs more cooking before sugar is added in the next batch.

Variations

• Use Seville oranges if you can find them. They’re bitter, classic, and what marmalade was originally made from.
• Add a splash of whisky or Scotch to the last batch for a Highland-style marmalade.
• Stir in a few cracked cardamom pods or a thumb of fresh ginger during the boil for a spiced version.