Best Onion For Fajitas: White, Red Or Yellow?

Last Updated on December 5, 2022 by

Today, we’re going to be looking at what is the best onion for fajitas. There are many varieties of onion, and all of them work well in different dishes. Whether you like a sharp onion taste, or a slightly sweet taste when it comes to onions – there’s an onion for everyone! Onions are an important ingredient in many dishes; one of them being fajitas. But what is the best onion for fajitas? Let’s take a closer look.

What Is White Onion?

White onion has quite a mild flavor, and is quite light in comparison to other types of onion. They have quite a short shelf life; this is because they are high in sugar and low in sulphur. White onions are most often used in Mexican dishes for their versatility.

What Is Yellow Onion?

The yellow onion (sometimes known as the brown onion) is the strongest flavor of the three onions we’re looking at. It can look white inside, or sometimes have a greenish tinge. It’s higher in sulphur, which is why this particular type of onion has a much stronger, eye-watering flavor.

What Is Red Onion?

If you’re looking for a mild, sweet onion that is perfect for caramelizing and adding sweetness to your dishes, the red onion is the best choice for you. It usually has a purple skin and is commonly used in cooking, but the skin is so vibrant, that it’s also used as a dye.

Nutritional Information Of White Onions

You may be curious as to the nutritional value of white onions. Each one cup of white onions contains the following:

  • Calories: 40
  • Carbohydrates: 15g
  • Dietary Fiber: 3g
  • Sugar: 7g
  • Fat: 0.2g
  • Protein: 2g
  • Sodium: 6mg

Click Here to Get Info About:

Nutritional Information Of Yellow Onions

You may be curious as to the nutritional value of yellow onions. Each one cup of yellow onions contains the following:

  • Calories: 40
  • Carbohydrates: 9g
  • Dietary Fiber: 2g
  • Sugar: 7g
  • Protein: 1g
  • Fat: 0.2g

Nutritional Information Of Red Onions

You may be curious as to the nutritional value of red onions. Each one cup of red onions contains the following:

  • Calories: 40
  • Carbohydrates: 11g
  • Dietary Fiber: 1.6g
  • Sugar: 5g
  • Fat: 0.1g
  • Protein: 1g
  • Sodium: 3mg

What Kind Of Onion For Fajitas?

When it comes to fajitas, you can use any type of onion. I’ve found that white, yellow and red onions all work well when it comes to fajitas. It just depends on the intensity of flavor you want from your onions. I prefer red onions because they’re sweeter, and counteract the heat. However, red onions aren’t common in Mexican cooking, as they’re not as powerful in flavor like white or yellow onions.

Onions Etcetera: The Essential Allium Cookbook

Best Onion For Fajitas

White Or Yellow Onion For Fajitas?

There isn’t too much difference when it comes to white or yellow onions. White onions are most often used in Mexican cuisine. This is because they have the strongest flavor, and they’re the most crisp. If you’re looking to add intense flavor into your fajitas, white onion is the onion to choose.

To put it simply, white onions have a “kick” and are the strongest in flavor. Yellow onions are not quite as strong, but still have a good flavor. Red onions are sweeter and add color to any dish you’re making. Red onions are not typically used in traditional Mexican cooking.

Take Out Time to Also Read:

How To Cut Onions For Fajitas

Cutting an onion couldn’t be easier. All you need to do is:

Step 1: Peel And Cut

Firstly, you’ll need to peel the onion. Once peeled, cut in half.

Step 2: Trim And Cut – Best Onion For Fajitas

Lay one half flat on your chopping board and cut off the stem and the root of the onion. Position the knife at an angle and follow the lines of the onion. Slice at an angle and keep following the onion layers with the onion lines. Once you reach the center, turn on it’s side and keep cutting until fully sliced.

How To Cook Onions For Fajitas

All you need to do is add the onions to a pan with hot oil. Leave to cook for around 5 minutes, until the onions become soft and translucent. At this point, you can add any herbs and spices of your choosing. Mix well. Remove from heat and serve. You can serve this dish with chicken, steak or any meat/seafood of your choice. Once it’s wrapped in a tortilla, these fajitas are absolutely incredible. Enjoy!

Fajitas Veggies Recipe – Best Onion For Fajitas

If you’re looking for my ideal fajitas veggies recipe (including sweet red onions, of course), this is my favorite recipe.


  • 4 thinly sliced bell peppers
  • 1 thinly sliced red onion
  • 2 minced garlic cloves
  • 1 tsp of cumin
  • 1 tsp of chili powder
  • 3/4 tsp of salt
  • 1/2 tsp of paprika
  • 1/2 tsp of oregano
  • 1 tbsp of canola oil


Step 1: Cook The Veggies

Grab a pan and heat the canola oil over a high heat. Once hot, add the bell peppers, garlic and red onion slices. Leave to cook for around 5 minutes, stirring often as it cooks.

Step 2: Season The Veggies

Now add the cumin, chili powder, salt, paprika and oregano to the vegetables and mix well. Taste and adjust the seasonings if necessary. Remove from heat and serve. You can serve in a tortilla with meat or seafood of your choice; such as chicken, steak or shrimp. Enjoy!

Conclusion – Best Onion For Fajitas

I hope this post has helped you to become more familiar with the best onion for fajitas. Although white onions are the most traditional in Mexican cuisine, you can choose whichever onions you like best. My favorite is red, because I like the sweetness that they bring to the dish.

Do you have any tips or tricks when it comes to the best onions for fajitas? If so, please feel free to let me know in the comments below. Sharing is caring!