Forktionary

Alum

Potassium aluminum sulfate Spice, Chemical Compound, Pantry Staple

Alum Spice, Chemical Compound, Pantry Staple

At a Glance

  • Category Spice, Chemical Compound, Pantry Staple

The Forktionary Angle

"A powerful but often misunderstood pantry staple, alum is the secret to perfectly crisp pickles and certain baking feats."

Definition

A crystalline salt primarily used as a pickling agent to maintain crispness in vegetables, a leavening component, or in traditional medicine.

Chemical Class Double Sulfate Salt
Primary Culinary Use Pickling (crispness)
Safety Concern High doses toxic

Flavor Profile

The primary flavor notes for Alum are:

Astringent Sour Metallic (not for direct consumption)

Chef’s Secret

When pickling, use alum sparingly (e.g., 1/4 tsp per quart jar) and always rinse thoroughly if using pickling lime, as excess can impart a metallic taste.

Best Substitutes

Calcium Chloride

for pickling crispness
Ratio 1:1

Pickling Lime

for pickling crispness, , requires rinsing
Ratio 1:1

Buying Guide

Purchase food-grade alum from reputable spice or canning suppliers. Store in a cool, dry place.

Culinary Pairings

Cucumbers (for pickles) green tomatoes unripe fruits (for preserves)

Recipes Using Alum

Banana Pepper Rings image 154
Technique 30 Minutes Or Less Technique Number Of Servings

Banana Pepper Rings

Capture the vibrant flavors of your garden with these homemade pepper rings! A delicious and crunchy alternative to store-bought, this recipe lets you use any peppers you have on hand – from sweet banana peppers to fiery jalapeños. Easy to customize and perfect for adding a zing to sandwiches, salads, or enjoying as a tasty snack.

See Complete Recipe