Bowl of Homemade Onion Salt

How to Make Onion Salt

Here’s how to make onion salt or a quick onion salt substitute. Only two ingredients required.

  • Author: Erin Huffstetler, MyFrugalHome
  • Prep Time: 2 minutes
  • Cook Time: 0 minutes
  • Total Time: 2 minutes
  • Yield: Varies
  • Category: Ingredient Substitutions
  • Method: Mix
  • Cuisine: Global


  • Salt
  • Onion powder or chopped onions


Combine three parts salt and one part onion powder.

For 1/4 cup (4 Tbsp): Use 3 Tbsp salt + 1 Tbsp onion powder.
To make one cup: Use  3/4 cup salt + 1/4 cup onion powder.

Store in an air-tight container. This onion salt doesn’t contain an anti-caking agent, so if you’ve been storing it awhile, you may need to break up a few clumps, before you use it.


To make onion salt from chopped onion (also known as dried onions or onion flakes), simply grind the chopped onions in a spice grinder, a food processor or with a mortar and pestle, to create the onion powder you need for this recipe.

Onion Salt Substitutes:

  • An equal amount of garlic powder
  • Replace One Tablespoon of onion powder with 1/4 cup grated (or finely minced) onion + 3/4 teaspoon salt. This will add bulk and moisture to your recipe, so it’s not suitable for every dish