The Best Onions for Fajitas: Rock Your Next Mexican Dish

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I love ordering extra onions when getting fajitas at my favorite Mexican restaurants. I know most people are suckers for bell peppers, but I’m the opposite…bring on those onions! But when making them at home, what are the best onions for fajitas?

Onions not only add flavor to fajitas, but they also contribute to the texture by adding a light crunch and some softness. It’s a beautiful combo.

When it comes to fajitas, the type of onion you choose can make a big difference in the flavor and heat of the dish. Some onions are milder, while others are more pungent and spicy.

Whether you prefer your onions to be on the crunchy side or soft and caramelized, there is a type of onion that will suit your taste buds. In this article, we will explore the best onions for fajitas and provide you with all the information you need to make the perfect fajita at home. Woot woot!

Best Onions for Fajitas

The Best Onions for Fajitas

When it comes to making the perfect fajitas, choosing the right onions is will either make your fajitas on point or just alright. Onions are a key ingredient in fajitas, providing a sweet and savory flavor that complements the meat and spices.

In this section, we’ll explore the best onions for fajitas and their unique flavor profiles.

onions with shrimp fajitas

Sweet Onions

Sweet onions are a great choice for fajitas if you’re looking for a milder yet sweet flavor. Vidalia onions and Maui onions are two popular types of sweet onions that work well in fajitas.

These onions have a high sugar content, making them sweeter and less pungent than other onions. They also have thinner skin, which makes them easier to peel and chop.

I love slightly caramelizing these kinds of sweet onions for my fajitas.

White Onions

White onions are a classic choice for fajitas. They have a strong, bold flavor that can stand up to the meat and spices in the dish. White onions also have a crisp texture that adds a nice crunch to the fajitas yet can get soft. They are a great choice if you want your fajitas to have a more pronounced onion flavor.

Yellow Onions

Yellow onions are another popular choice for fajitas. They have a slightly milder flavor than white onions but still provide a strong, savory taste.

Yellow onions are also a good choice if you want your fajitas to have a sweeter flavor. They are versatile onions that can be used in a variety of dishes they also work good for things like chili.

Red Onions

Red onions have a bold, pungent flavor that can add a nice kick to your fajitas. They also have a beautiful color that can make your dish look more visually appealing if not cooked too long.

Red onions are a great choice if you want your fajitas to have a slightly sweeter flavor than white onions.

Spanish Onions

Spanish onions are a larger, sweeter onion that is commonly used in Mexican cuisine. They have a milder flavor than yellow onions and a slightly thicker skin. Spanish onions are a good choice if you want your fajitas to have a sweeter, more subtle flavor.

In conclusion, the best onions for fajitas are the ones that match your personal taste preferences. Whether you prefer a milder flavor or a bolder taste, there is an onion that will work perfectly for your fajitas.

Experiment with different types of onions to find the perfect onion for your next fajita meal. Or you can even mix two different onions.

Mexican Pickled Onions (Cebollas Curtidas)

I love love love pickled onions!

If you’re looking for a way to add a tangy and sweet flavor to your fajitas, Mexican pickled onions are a great option. Not to cook with your fajitas but as a topper.

You will get those beautifully soft and slightly crunchy onions with the addition of the fresh crunchy bright flavors of pickled onions.

These onions are easy to make and can be prepared beforehand, making them a convenient addition to any meal not just your fajitas.

To make Mexican pickled onions, you’ll need red onions, lime juice, vinegar, salt, and pepper. You can also add other spices, like Mexican oregano to give the onions a more complex flavor.

Here’s how to make them:

  1. Cut off the stem of your onions and peel the outer skin. Wash them and pat dry them with a clean kitchen towel.
  2. Cut the ends of the onions and slice them into thick rings (about 0,11″/0.3mm). I recommend using a mandolin since it makes it so much easier to get those perfect slices.
  3. In a glass bowl or jar, add all ingredients and toss to combine.
  4. Refrigerate for at least 30 minutes before serving. Taste again before serving, and add salt if needed.

Mexican pickled onions can be stored in the refrigerator for up to two weeks, so you can make a big batch and use them for multiple meals.

They’re a great topping for fajitas, tacos, and other Mexican dishes, and can also be used to add flavor to salads and sandwiches.

If you would like an exact recipe, check out Muy Delish’s recipe for Pickled Mexican Onions.

How to Choose and Cut Onions for Fajitas

Now, back to our hunt for the best onions for fajitas. When it comes to making delicious fajitas, choosing the right type of onion and cutting it properly can make a big difference in the final taste and texture of your dish.

yellow white red onions for fajitas

Here are some tips to help you choose and cut onions for fajitas that will wow your taste buds and your guests

Choosing the Best Onion for Fajitas

The best onion for fajitas is one that has a natural sweetness and a mild flavor that won’t overpower the other ingredients in your dish.

Yellow onions are a great choice for fajitas because they have a bold flavor that can stand up to spices and meat. They are my first pick! They caramelize nicely and keep a nice crunch. For me, I also like that yellow onions have a slight yellow-gold color, and when cooked, this is makes for a very nice-looking fajita mix.

White onions are a milder and a little sweeter option compared to yellow onions. They can enhance the overall savory profile of your fajitas. They are easy to find and work great.

Now red onions are also a great choice if you want to add a mildly spicy, yet sweet flavor to your dish. My only beef with using red onions is the color. Sometimes when cooking with red onions their color gets muddy looking.

It’s just not the most appetizing color especially if you will be using green bell peppers. But remember this is an aesthetic issue, not a flavor one.

When choosing onions for fajitas, make sure they are fresh and firm to the touch. Avoid onions that have soft spots or are starting to sprout, as the flavor begins to change.

Onions I Don’t Recommend For Fajitas

A lot of onions can be used for fajitas. The ones above are my top three but even a sweet onion like a Walla Walla will work. But there are a few that I don’t recommend using when making fajitas.

green onions
  • Green Onions or Scallions
  • Leeks
  • Spring Onions
  • Cipollini Onion
  • Shallots

I want to say that shallots are wonderful little onions with a hint of garlic. They are pretty small compared to other onions and much sweeter. If you want them in your fajitas, then I would recommend blending them with another onion, like a yellow or white one.

Cutting Onions for Fajitas

sliced white onions for fajitas

To cut onions for fajitas, start by cutting off the top and bottom of the onion and peeling away the outer layer.

Cut the onion in half from top to bottom. Lay one half flat on your chopping board and cut off the stem and the root of the onion.

Next, make lengthwise cuts by slicing the onion from top to bottom, without cutting all the way through the root end.

Then, make horizontal cuts across the onion, again without cutting all the way through the root end. Finally, slice the onion crosswise to create small, uniform pieces.

If you prefer larger pieces of onion in your fajitas, you can skip the horizontal cuts and simply slice the onion crosswise into thicker pieces.

You just don’t want diced, and chopped onions. You are looking for those little crescent moon shapes!

My Final Thoughts On The Best Onions For Fajitas

Choosing the right onion for your fajitas can make a big difference in the overall flavor of the dish. After researching and analyzing various sources, we have come to the conclusion that there are a few different types of onions that work well for fajitas.

In Mexican cuisine, fajitas are a popular Tex-Mex dish that has been around for centuries. Traditionally, fajitas were made with beef, but nowadays, you can find them made with chicken, shrimp, or even vegetables.

When it comes to choosing the right onion for your fajitas, there are a few things to consider.

Yellow onions are a popular choice because they have a strong, savory flavor that pairs well with chicken and vegetarian fajitas. On the other hand, white onions are milder and have a shorter shelf life due to their high sugar content.

If you’re looking for a sweeter taste, red onions are a great option. They are slightly sweeter than other onions and have a pretty color that can add some visual appeal to your dish.

It’s important to note that raw onions can be quite crunchy and overpowering, so it’s best to cook them with your fajitas to soften their texture and mellow out their flavor.

If you’re not a fan of onions, you can always substitute them with other vegetables like bell peppers or mushrooms.

In conclusion, choosing the right onion for your fajitas can enhance the overall flavor of your dish.

Whether you prefer yellow, white, or red onions, it’s important to cook them with your fajitas to soften their texture and mellow out their flavor.

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