Homemade Mustard Pickles

Homemade mustard pickles are a Maritime Canadian and New England staple, the kind of bright yellow relish that sits next to baked beans, ham, or fish cakes on every supper table from autumn through winter. A garden’s worth of cauliflower, green tomatoes, cucumbers, peppers, and pearl onions get bound together in a thick, golden mustard-turmeric sauce that’s equal parts tangy and warm.

The overnight salt soak is the move that gives this pickle its crunch. Salt pulls excess water from the cut vegetables, firming them up so they hold their texture under the long simmer in mustard sauce. Skip this step and you’ll wind up with limp, watery pickles.

The mustard sauce itself is what defines this jar. Mixing the dry mustard, flour, sugar, and turmeric together first, then whisking in boiling vinegar, prevents lumps. Pour cold vinegar in and you’ll get a clumpy mess that ruins the silky, gravy-like texture this pickle is famous for.

Dividing the recipe between two kettles is more than just a yield trick. The thick mustard sauce scorches easily on the bottom of an overcrowded pot. Working with smaller batches keeps the heat distribution even and the bottom from burning.

Process in a boiling water bath for 15 minutes for shelf-stable jars that keep for a year or more. Wait at least two weeks before opening so the flavors fully marry.

Pro Tips

• Use pickling salt, not iodized table salt. Iodine clouds the brine and dulls the turmeric color.
• Stir constantly during the boil to prevent the flour from sinking and scorching.
• Leave a half inch of headspace in each jar to allow for safe expansion during processing.
• Serve alongside ham, baked beans, hot dogs, or sharp cheddar.

Variations

• Use white distilled vinegar instead of apple cider vinegar for a sharper, cleaner brine.
• Add a tablespoon of celery seed and a few crushed peppercorns for extra warm spice.
• Toss in a few diced jalapeños or a tablespoon of red pepper flakes for a sweet-heat version.