Name: Beef Teriyaki Foil Packets
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Ingredients: 1 lb. flank steak (thinly sliced); 1 cup homemade teriyaki sauce; 1 red bell pepper (cut into 2-3 inch slices); 1 small head broccoli (cut into bite-sized florets); 2-3 carrots (peeled and cut into ¼-½ inch slices); 1 small red onion (cut into 2-3 inch slices); 2 Tbsp. olive oil; ½ - ¾ tsp. salt; ¼ tsp. black pepper; Green onions (optional); Toasted sesame seeds (optional); White rice (or cauliflower rice, optional)

Beef Teriyaki with Vegetables is made in handy foil packets so after dinner clean-up is a breeze! A healthy teriyaki sauce is made from scratch and is perfectly sweet, thick, and sticky. Prep this easy steak foil packet dinner for busy weeknight dinners or pop them on the grill for a quick camping meal!

Beef Teriyaki Foil Packet Dinner

Foil packet dinners are one of those things that just might change your cooking life.

Think I’m kidding you?

Imagine being able to cook up an entire dinner (vegetables, meat, and all!) on ONE sheet pan and with minimal clean-up?

Not to mention, all of the delicious flavors meld together while cooking which makes it oh so delicious.

They also make a quick and easy dinner that you can either meal prep for the week or bring along with you camping!

Yup! Below you’ll find the instructions for baking these beef teriyaki foil packets in the oven or cooking them up on the grill.

And once you’ve had a taste of the foil packet life, you might want to check out these Shrimp Scampi Packets and this Lemon Basil Baked Salmon, too!

Ingredients

The ingredients for this recipe are as simple as you would like to make them. Save a little time by purchasing pre-cut vegetables at the store, or go the extra step and make the teriyaki sauce from scratch. The choice is totally up to you!

Beef – Flank steak is the best cut of beef to use. It’s lean, tender, and cooks up at a similar rate to the other vegetables in the packets. Read more below about the best way to cut flank steak for this recipe. If you’re having trouble finding this cut of beef, skirt steak or flat iron steak may also be substituted. But do note – these cuts of beef are not as tender or lean as flank steak.
Vegetables – A combination of bell pepper, broccoli, carrots, and onion are used in this recipe. The bright colors of these vegetables make the dish not only beautiful, but also incredibly nutritious for you. Feel free to substitute one vegetable for the other or use another vegetable you already have on hand.
Teriyaki Sauce – A healthy homemade teriyaki sauce recipe is recommended. You can quickly and easily make this sauce in less than 10 minutes and store it for a few days in the refrigerator until ready to use. You can also use a store bought teriyaki sauce if you’re pressed for time. San-J makes a really delicious and gluten-free sauce.

Preparing the Beef and Vegetables

Since the meat and vegetables are cooking together at the same oven temperature and for the same length of time, it’s crucial that you cut them into the correct size.

If you cut the vegetables too small they will end up over-cooking. Cut them too large, and they will not become tender.

For the vegetables, cut the broccoli into 1-inch pieces, the bell pepper and onion into 2-3 inch long strips that are ½-inch thick, and the carrots into

¼ to ½-inch thick slices.

For the beef, it’s always best to cut steak against the grain for the most tender cut. To do this, locate the grains, or lines, running through the piece of steak. Place your knife perpendicular (at a 90-degree) to these lines and thinly slice it into ¼ to ½-inch thick strips.

How to Make Foil Packets

To make these beef teriyaki foil packets you’ll want to follow these step-by-step directions. (Read more detailed information in recipe card below.)

Add cut vegetables to a large bowl and toss with olive oil, salt, and pepper.
Tear off four pieces of aluminum foil that are 15-16 inches long.
Place 4 ounces of steak in the center of each piece of aluminum foil. (step 1 & 2 above)
Add equal amounts of vegetables to each packet. (step 1 & 2 above)
Pour 2 tablespoons of teriyaki sauce on top of the vegetables in each packet. (Reserve the remaining ½ cup of sauce.)
Grab the top and the bottom portions of the aluminum foil and twist them together until tight. Fold over the right and left sides of the foil towards the middle and pinch each side together to form a packet. (step 3 & 4 above)
Place foil packets on a baking sheet and bake in a 400°F oven for 20-25 minutes, or until beef is cooked to your desired doneness. (step 5 above)

Make it Crispy!

When you first pull out the foil packets you’ll notice that the vegetables and beef are a little soft.

That’s totally OK! There’s a little trick I like to do that makes the vegetables crispy and gives the beef a nice char:

Remove packets from the oven and brush with the reserved teriyaki sauce.
Turn oven to a high broil and broil the open packets for 2-3 minutes.

And voila! The sugar in the sauce helps the beef and vegetables to caramelize slightly and get those perfect, crunchy edges.

Grill it when Camping

So what if you want to take these awesome foil packets with you camping?

It’s actually super simple to either pop these onto an open flame or cook them on a grill.

For an open flame simply place foil packets even spaced over the flame and cook for 15-20 minutes.

For a grill, set it to a medium to medium-high heat and cook packets for 15-20 minutes.

Serving

This beef teriyaki could be a complete meal on its own, but there are a few ways you can zhuzh it up before serving:

Sprinkle on some chopped green onions or cilantro.
Top it with a bit of toasted sesame seeds.
Serve it over a bed of white rice, quinoa, or even cauliflower rice.

Alternative to Aluminum Foil

There has been quite a bit of discussion about the ill-effects aluminum foil has when cooked at high heat.

If you are concerned about the heavy metals leaching into your food, then you can place a piece of parchment paper onto the foil before adding in your beef and vegetables.

This works equally as well as only using aluminum foil. Make sure you cut the parchment paper a little smaller than the aluminum foil so you are only using the foil to tightly wrap up the packet.

Beef Teriyaki Foil Packets