DIY Onion Powder

Easy Homemade Onion Powder

Julia Child once said, “It’s hard to imagine a civilization without onions.”

And while they may seem insignificant, onions are one of the most important building blocks of any savory recipe, likely just as important as a dash of salt. Yellow onions in particular have the strongest flavor of any onion, which is why they’re a staple in nearly all of The Fresh 20 recipes.

And this one is no different. Because the one and only ingredient is… 1 yellow onion.

DIY Spices

Taking a little time to make your own spices can save money, add better flavor to recipes than store-bought, and help you avoid preservatives. There’s no match for fresh onion powder, so I’ve committed to making my own.

It’s a simple process that involves dehydrating the ingredients, then using a spice grinder to make a fine powder. The active prep time is really less than 5 minutes!

Homemade Onion Powder Recipe


DIY Onion Powder

  • Author: The Fresh 20
  • Prep Time: 1 minute
  • Cook Time: 2 hours
  • Total Time: 2 hours, 1 minute
  • Yield: 1 small jar


Pure, flavorful homemade onion power


  • One medium yellow onion


  1. Preheat oven to 150 degrees F or 200 degrees if that is the lowest your oven will go
  2. Peel and thinly slice onion
  3. Arrange on a parchment lined baking sheet and bake for at least two hours until the onion is dehydrated. Two hours is best but the key is making sure the pieces are crumbly dry. Let cool.
  4. Grind in a spice grinder, crush with a mortar and pestle or mash with the back of a spoon.

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