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Looking for an easy and delicious weeknight dinner? Look no farther. Beef fajitas in the oven is such a quick and tasty meal. These sheet pan fajitas are made with sirloin steak, although many steaks will work with this recipe. They'll be table ready in just 30 minutes, they taste great, and are simple to clean up.
This recipe is as easy as chopping the veggies, seasoning the steak, putting everything on the sheet pan, and tossing it in the oven. No matter how you eat them, the cooking process is made super simple on a couple of sheet pans. You'll even have time to pour yourself a glass of wine and relax while it cooks.
Tools to make these sheet pan steak fajitas
- Sheet pan (also called a baking sheet) - I always recommend that people measure their oven and get two sheet pans that will fit side by side, so you don't have to worry about changing the positions of the pans mid-way through cooking. Order the size you need here.
- Meat thermometer - Use a digital instant read thermometer (like this one). The steak is rare at 120(F), medium-rare at 130(F), medium at 140(F), medium-well at 150(F), and well done at 160(F).
- Aluminum Foil - For a mess-free meal, line your sheet pan with foil to make cleanup a breeze.
Ingredients for these beef fajitas in the oven
- Steak - I used sirloin when developing the recipe. Flank steak would also work great.
- Veggies - I used bell peppers, onion, and carrots. Use what you've got, just pay attention to the size as you're chopping - more on that later.
- Oil - We prefer to use avocado oil or olive oil in our house.
- Salt - You just need enough to sprinkle over veggies and meat.
- Spice Mix - I love this simple taco / fajita seasoning mix. You'll need chili powder, cumin, and garlic powder)
- Lime - I love squirting lime juice over the top of this meal when it's out of the oven. It really brings the flavor up a notch!
- Other fixin's - Cilantro, guacamole, lettuce, tortillas, salsa, rice, beans - You get to decide how much of the "extras" you want on your fajitas.
How to make beef fajitas in the oven
First you'll mix your spices. I love using this easy taco seasoning recipe (also written out in the recipe below) to season my steak and veggies.
Prep the veggies:
Next, chop your veggies. The key to success with a sheet pan recipe is cutting all the veggies to a specific thickness. You want to time it so that all the components will finish cooking at the same time.
- Chop the carrots pretty thin (¼" or less)
- Chop bell peppers between ¼" and ½"
- Chop the onion between ¼" and ½"
Prep the steak:
Once your veggies are cut, it's time to prep the steak. This recipe uses sirloin steak, but flank steak is also a great choice for fajitas. If you want to use flank steak, go ahead! I say use what you've got.
Leave the steak whole and place it in the middle of your sheet pan (as pictured below).
How to Cook your beef fajitas in the oven:
Put the meat and veggies in a single layer on the sheet pan and drizzle oil and sprinkle salt over everything. Sprinkle the seasoning mix over the veggies and rub the remaining seasoning into the meat on both sides.
Cook your fajita sheet pan in your 400 (F) degree oven for 15-20 minutes (until steak is cooked how you like, and veggies are done). Use a meat thermometer to check the meat at the 15 minute mark.
Depending on the thickness and size of your steak, it may need to come out of the oven before the veggies are done. I used a sirloin steak that was about ¾" thick, which I cooked for 20 minutes. It came out "medium" with a little pink in the middle.
Once everything is out of the oven, squeeze the lime juice over everything for a boost of flavor. Then, eat and enjoy!
Baked steak fajitas three ways:
These oven baked sheet pan steak fajitas can be made in a few different ways (all from the same recipe):
- Steak Fajita Salad: Get some greens, put the steak and veggies on top and you've got a salad! This makes the dish into delicious keto / low carb steak fajitas (without tortillas).
- Simple Steak Fajitas: Get some tortillas (here's my homemade tortilla recipe), and fill them up with the steak and veggies from the sheet pan.
- Deluxe Fajitas: Make a few extra dishes (guacamole, rice, beans) to go with your steak fajitas. The extra dishes are optional, and totally up to you based on what you have time for and what sounds the best.
INGREDIENT SUBSTITUTION Ideas
I like mixing up the veggies in this recipe to use what I have on hand. So, while the recipe at the bottom of the page calls for carrots, peppers, and onions, you could easily omit one or more of those, or swap them out for another vegetable.
I like to use carrots, peppers, and onions. You can add in a different veggie (or swap something out if you'd like). The important thing to remember is to get everything cut to the right size so it cooks at the same time (that's what's great about a sheet pan meal).
As the recipe is written, it's pretty mild on the spice scale. If you'd like to amp up the spicy-ness, you can sprinkle in some cayenne pepper (a little goes a LONG way), or use your favorite hot sauce when you dish up your plate.
I used sirloin when I was developing and testing this recipe. Flank steak would also work great if you prefer it.
Looking for more sheet pan recipes?
Once you discover the magic of sheet pan meals, you'll never want to go back! Here are more sheet pan recipes for you to enjoy this week!
- 11 Mouthwatering Sheet Pan Dinners to Make Tonight
- 24 Incredible Gluten Free Sheet Pan Dinners
- Sheet Pan Veggie Fajitas
- 1 lb sirloin steak
- 2 bell peppers
- ½ onion
- 2 large carrots
- 2 Tbs oil
- ½-1 teaspoon salt (enough to sprinkle over veggies and meat)
- 4 teaspoon chili powder
- 2 teaspoon cumin
- 1 teaspoon garlic powder
- 1 lime
- cilantro, for garnish (optional)
- Slice your veggies into strips – carrots about ¼″ wide, peppers and onions about between ¼″ and ½″ wide.
- Preheat oven to 400 (F).
- Arrange everything on your sheet pan in a single layer (or two, depending on the size you have).
- Drizzle oil evenly over everything.
- Sprinkle salt evenly over everything.
- Mix the spices together in a small bowl and sprinkle about half the mixture over the veggies, and rub the rest into both sides of the meat.
- Put the halved lime on the sheet pan, cut side down and bake with everything else for extra flavor.
- Bake for 15-20 minutes. If your steaks are smaller, you’ll want to pull them out earlier. Timing on the steak depends on the done-ness that you want.
- Squeeze the lime juice over the cooked veggies and meat, then enjoy!
- Eat the meat and veggies with tortillas or on a bed of lettuce.
- Top with guacamole and cilantro (optional)
Nutrition Information:Yield: 4 Serving Size: 1
Amount Per Serving: Calories: 386Total Fat: 24gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 14gCholesterol: 104mgSodium: 449mgCarbohydrates: 11gFiber: 3gSugar: 3gProtein: 32g