How To Cut Onions For Fajitas? A Step-by-Step Guide

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If you are a fan of Mexican cuisine, then you are probably familiar with fajitas. Fajitas are a popular and flavorful dish that typically consists of grilled meat, vegetables, and spices, all wrapped in a warm tortilla. One key ingredient that adds a lot of flavor and texture to fajitas is onions. However, cutting onions can be a bit of a challenge, with tears and uneven slices. 

In this blog post, I will discuss how to cut onions for fajitas like a pro. I will provide step-by-step instructions on how to cut onions into half-moon or julienne slices, as well as tips for even slicing. So, whether you’re a seasoned home cook or a beginner, keep reading to learn how to cut onions for fajitas that will impress your friends and family.

Equipment needed

To cut onions for fajitas, you will need a few basic pieces of equipment:

  • Cutting board: Choose a sturdy cutting board that is large enough to accommodate the size of your onion.
  • Sharp knife: Use a sharp chef’s knife or a santoku knife for cutting onions. A dull knife can slip and cause accidents.
  • Bowl for discarding scraps: Keep a bowl nearby to collect the onion scraps and make cleaning up easier.
  • Optional: Onion goggles – These goggles can help prevent tears from the onion’s potent gases. If you do not have onion goggles, you can also try chilling the onion in the refrigerator for a few minutes before cutting, cutting under running water, or breathing through your mouth while cutting.

Choosing and preparing onions

When choosing onions for fajitas, I typically go for sweet onions or yellow onions. Sweet onions have a milder flavor and are perfect for those who don’t like a strong onion taste. Yellow onions, on the other hand, have a stronger flavor and are ideal for those who prefer a bolder taste.

Before preparing the onions, I like to select ones that are firm and heavy for their size. I also look for onions that have no signs of damage or mold.

To prepare the onions, I start by cutting off the ends and removing the papery outer layers. I then rinse the onion under cold water and pat it dry with a paper towel. This helps remove any dirt or debris on the onion’s surface.

After this, I cut the onion in half lengthwise and peel off the outer layer. Finally, I place the onion flat side down on the cutting board and slice it according to the desired cutting technique. By following these steps, I ensure that my onions are fresh, clean, and ready to be used in my fajita recipe.

How to cut onions for fajitas?

Grab some onions, a sharp knife, and follow our step-by-step instructions

Which part of the onion do you cut?

When cutting an onion for fajitas, you will typically cut the root end off but leave the stem end intact. This helps to hold the onion together while you are making your cuts.

To start, cut off the top and bottom ends of the onion using a sharp knife. Then, cut the onion in half lengthwise from top to bottom. Place one half of the onion flat side down on the cutting board and make horizontal cuts across the onion, slicing from the top down to the cutting board. Next, make vertical cuts from the top of the onion down towards the cutting board, but not all the way through the root end. Finally, slice perpendicular to the previous cuts, making thin strips of onion.

How to slice an onion for fajitas? (Half-moon slices)

how to slice an onion for fajitas

Half-moon slices are a popular way to slice onions for fajitas. Here is a step-by-step guide on how to do it:

Step 1: Cut off the ends of the onion and slice it in half from the top to bottom.

Step 2: Peel off the papery skin from each half of the onion.

Step 3: Place one of the onion halves flat side down on the cutting board.

Step 4: Starting at one end of the onion half, make horizontal cuts across the onion, slicing from the top down to the cutting board. Make sure to leave the root end of the onion intact to hold it together.

Step 5: Next, make vertical cuts from the top of the onion down towards the cutting board, but again, not all the way through the root end.

Step 6: Finally, slice perpendicular to the previous cuts, making half-moon shaped slices.

Tips for even slicing:

  • Use a sharp knife: A dull knife can crush the onion and make it difficult to slice evenly.
  • Keep the root end intact: The root end helps hold the onion together, making it easier to slice and preventing the onion from falling apart.
  • Slice at a consistent thickness: Try to slice the onion slices to a consistent thickness to ensure that they cook evenly.

How to cut onion strips for fajitas? (Julienned slices)

how to cut peppers and onions for fajitas

Julienned onion slices are another popular way to prepare onions for fajitas. Follow these step-by-step instructions to julienne an onion:

Step 1: Cut off the ends of the onion and slice it in half from the top to bottom.

Step 2: Peel off the papery skin from each half of the onion.

Step 3: Place one of the onion halves flat side down on the cutting board.

Step 4: Starting at one end of the onion half, make vertical cuts from the top of the onion down towards the cutting board, but not all the way through the root end.

Step 5: Next, make horizontal cuts across the onion, slicing from the top down to the cutting board.

Step 6: Finally, slice perpendicular to the previous cuts, making thin, julienned onion strips.

Tips for julienne slicing:

  • Use a sharp knife: A dull knife can crush the onion and make it difficult to slice evenly.
  • Keep the root end intact: The root end helps hold the onion together, making it easier to slice and preventing the onion from falling apart.
  • Slice at a consistent thickness: Try to slice the onion strips to a consistent thickness to ensure that they cook evenly.
  • Practice makes perfect: Julienne slicing takes a bit of practice, so don’t be discouraged if your first attempt isn’t perfect. Keep practicing and soon you’ll be julienning onions like a pro.

How to cut a white onion for fajita?

Cutting a white onion for fajitas is similar to cutting other types of onions. Here are the steps to follow:

Step 1: Cut off the top and bottom ends of the onion using a sharp knife.

Step 2: Peel off the dry, papery outer layer of the onion, leaving the white flesh exposed.

Step 3: Cut the onion in half lengthwise from top to bottom.

Step 4: Place one half of the onion flat side down on the cutting board.

Step 5: Starting at one end of the onion half, make horizontal cuts across the onion, slicing from the top down to the cutting board. Make sure to leave the root end of the onion intact to hold it together.

Step 6: Next, make vertical cuts from the top of the onion down towards the cutting board, but not all the way through the root end.

Step 7: Finally, slice perpendicular to the previous cuts, making thin strips of onion.

Make sure to slice the onion strips to a consistent thickness to ensure that they cook evenly. Repeat these steps for the other half of the onion.

How to cut a yellow onion for fajitas?

Cutting a yellow onion for fajitas is similar to cutting other types of onions. Here are the steps to follow:

Step 1: Cut off the top and bottom ends of the onion using a sharp knife.

Step 2: Peel off the dry, papery outer layer of the onion, leaving the yellow flesh exposed.

Step 3: Cut the onion in half lengthwise from top to bottom.

Step 4: Place one half of the onion flat side down on the cutting board.

Step 5: Starting at one end of the onion half, make horizontal cuts across the onion, slicing from the top down to the cutting board. Make sure to leave the root end of the onion intact to hold it together.

Step 6: Next, make vertical cuts from the top of the onion down towards the cutting board, but not all the way through the root end.

Step 7: Finally, slice perpendicular to the previous cuts, making thin strips of onion.

Make sure to slice the onion strips to a consistent thickness to ensure that they cook evenly. Repeat these steps for the other half of the onion.

FAQs

How to cut peppers and onions for fajitas?

​​Cutting peppers and onions for fajitas is a simple process. Here are the steps to follow:

For the peppers:

  • Step 1: Cut off the top of the pepper and remove the seeds and white membranes from the inside.
  • Step 2: Slice the pepper in half from top to bottom.
  • Step 3: Slice the pepper into thin strips, about 1/4 inch wide.

For the onions: As I mentioned above

Make sure to slice the pepper and onion strips to a consistent thickness to ensure that they cook evenly.

What kind of onions do I use for fajitas?

While white and yellow onions are the most commonly used onions for fajitas, there are other types of onions that can be used to add different flavors and textures to the dish. Here are some other types of onions that you can use for fajitas:

  • Red Onions: Red onions have a slightly sweet and mild flavor and can add a pop of color to your fajitas.
  • Sweet Onions: Sweet onions, such as Vidalia or Walla Walla onions, have a milder flavor and are sweeter than other types of onions. They are great for adding a subtle sweetness to your fajitas.
  • Shallots: Shallots have a delicate, sweet flavor and can be used to add a more subtle onion flavor to your fajitas.

When choosing an onion for your fajitas, it’s important to consider the flavor and texture that you want to add to the dish. While white and yellow onions are the most commonly used onions for fajitas, using other types of onions can add variety and depth to the flavor profile of the dish.

How to prevent crying when cutting an onion?

There are several ways to prevent crying when cutting an onion. Here are some tips:

  • Chill the onion: Try placing the onion in the refrigerator for 30 minutes or the freezer for 10 minutes before cutting it. The cold temperature will slow down the release of the gas that causes the tears.
  • Cut under running water: Cutting onions under running water can help to wash away the gas that causes tears.
  • Use a sharp knife: A sharp knife will create less damage to the onion’s cell walls, releasing fewer irritants that cause tears.
  • Cut near a flame: Try cutting the onion near a gas flame or a lit candle. The heat will draw the gas away from your eyes.
  • Wear goggles: Wearing goggles can prevent the gas from reaching your eyes.

How to store cut onions?

If you have leftover onions after cutting them for fajitas, it’s important to store them properly to maintain their freshness and prevent them from spoiling. Here are some tips for storing cut onions:

  • Wrap in plastic wrap: Wrap the cut onion tightly in plastic wrap, making sure there is no air inside the wrap. This will help to keep the onion fresh and prevent it from drying out.
  • Store in an airtight container: Place the cut onion in an airtight container and seal it tightly. This will help to keep the onion fresh and prevent it from absorbing any odors from other foods in the refrigerator.
  • Store in the refrigerator: Cut onions should be stored in the refrigerator at a temperature between 35-40°F. They should be used within 2-3 days.
  • Avoid storing with certain foods: Onions can emit a strong odor and should not be stored with foods that may absorb the smell, such as dairy products or bread.

Conclusion

Now you know how to cut onions for fajitas like a pro! With the right technique and practice, it’s easy to dice up an onion into perfect strips that will make your dish look great. Not only does proper cutting help with presentation but it also ensures all of your ingredients are cooked evenly. So go ahead and give this method a try – you’ll be sure to impress everyone at the dinner table with perfectly prepared fajitas!