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These Slow Cooker Cajun steak packets are rich, buttery, and packed with bold flavor with just three ingredients. Tender steak cooks in individual foil packets, soaking up Cajun seasoning and buttery juices. This simple dinner comes together with minimal effort and cleanup.
Why You’ll Love It
- Just three ingredients — steak, Cajun seasoning, and butter are all it takes.
- Hands-off cooking — the Slow Cooker handles the work while the packets cook.
- Easy to adjust — choose a mild or bold Cajun blend to control the heat.
- Minimal cleanup — four foil packets, a bowl, and maybe a pair of tongs.
Ingredient Notes
For the steak, sirloin is probably a favorite here because it gets tender without costing the same as a small appliance. Flank steak works nicely too, especially sliced thinly across the grain. Round steak is more budget-friendly and honestly very good when you give it the longer LOW cooking time. It may not look glamorous going in, but it cooks up tender after a longer LOW cooking time.
Use a Cajun seasoning you actually like. They vary quite a bit. Some are heavy on garlic, some lean salty, some have enough cayenne to make you reconsider your choices. Any store-bought or homemade Cajun blend is fine. Do not add salt separately because most Cajun seasonings have plenty already.
Unsalted butter lets the seasoning do the talking. Melt it gently; it doesn’t need to be sizzling or browned. You can use ghee if preferred. It gives the packets a slightly nuttier flavor, though plain butter works well.
Ingredients
- 2 pounds Beef steak, such as sirloin, flank, or round, sliced into 1/2-inch strips
- 3 tablespoons Cajun seasoning, store-bought or homemade—use a mild one if a milder heat level is preferred
- 6 tablespoons unsalted butter, melted
Instructions
Set out your Slow Cooker and tear off 4 large sheets of heavy-duty aluminum foil, each about 12 to 14 inches long. If your foil seems flimsy, double it up for each packet. Do not skip that if you can help it; buttery steak juice escaping into the bottom of the cooker is not tragic, but it does defeat the tidy little-packet idea.
Pat the steak strips dry with paper towels, then put them in a large bowl. This takes an extra minute, but dry meat holds onto seasoning better.
Sprinkle the 3 tablespoons of Cajun seasoning over the steak and toss everything together with clean hands or tongs until the strips are coated all over. If you have 10 to 15 minutes to let it sit, go ahead and do that. If time is short, just keep moving. It will be fine.
Lay the foil sheets flat on the counter and divide the seasoned steak evenly among them, piling each portion right in the center. Leave room around the edges because you need enough foil to make a proper seal—not a little open canoe situation.
Drizzle the melted butter evenly over the steak in all four packets. Each pile should get a good spoonful. You can hold back about 1 tablespoon of butter if you want to drizzle it over the seams later, though pouring it all in at once also works.
Bring the long sides of each foil sheet up over the steak and fold them together several times to make a tight seam. Fold and crimp the short ends up and inward, sealing each packet completely. Keep the seam on top. Think of wrapping a present without ribbon.
Place the packets seam-side up in the slow cooker, stacking lightly if you need to, though keeping them mostly in one layer or slightly overlapping allows the heat to circulate. If you reserved that little bit of butter, drizzle it along the tops now for a glossy, rich finish.
Cover the slow cooker and cook on LOW for 4 to 6 hours or on HIGH for 2 to 3 hours. Sirloin usually lands on the shorter end, while round steak needs more time to relax and get tender. Resist lifting the lid every half hour—slow cookers lose heat every time you peek.
Carefully open one packet when you think the steak is ready, keeping your face and hands back from the steam. The steak should be cooked through, easy to cut with a fork, and reach at least 145°F internally. If it needs more time, seal it back up as best you can and cook another 30 minutes before checking again.
Turn off the slow cooker and use tongs to move the packets to plates or a platter. Open each packet at the table, then spoon those buttery Cajun juices over the steak and whatever you’re serving alongside it. Rice, mashed potatoes, buttered egg noodles—anything that catches the juices is doing good work.
Variations
To keep this truly a three-ingredient recipe, don’t start tossing vegetables or onions into the packets. Onions would be good. Peppers would be good. A whole lot of things would be good with butter and Cajun seasoning. But sometimes the beauty is that dinner is already handled.
A smoky Cajun blend adds a deeper, almost grilled flavor even though the packets come out of the slow cooker. Flank steak, sliced very thin, also works well.
Using way less butter is not terrible, but it is not the same. The little pool of seasoned butter is part of the point here. The full amount works best.
Storage & Reheating
Let leftover steak cool, then remove it from the foil packets and refrigerate it in shallow containers within 2 hours. Pour every last bit of the buttery juice over the steak before storing it—that keeps it from drying out and makes lunch the next day considerably less depressing.
It keeps well in the refrigerator for about 3 to 4 days. Reheat it until steaming hot, either in a covered skillet over low heat or in the microwave with a loose cover. Add the juices from the container too. Don’t blast it to kingdom come in the microwave, though; steak can go from tender to chewy in a hurry.
Don’t leave the packets on the slow cooker’s warm setting for more than 2 to 3 hours. The warm setting is handy at staggered mealtimes, but it is not a magical food-preservation device.
Final Notes
There’s something nice about opening a foil packet at the table. Maybe it’s the steam, maybe it’s the little dinner surprise, even though the contents are no secret.
On a busy night, this is the kind of meal that brings dinner together with minimal effort. Extra rice and the last spoonful of juice pair especially well with the buttery Cajun steak.
And honestly? For three ingredients and a little foil, that’s not too shabby.
Slow Cooker 3-Ingredient Cajun Steak Packets
Ingredients Â
- 2 pounds beef steak, such as sirloin, flank, or round sliced into 1/2-inch strips
- 3 tablespoons Cajun seasoning store-bought or homemade; use a mild blend for less heat
- 6 tablespoons unsalted butter melted
InstructionsÂ
- Set out the slow cooker and tear off 4 large sheets of heavy-duty aluminum foil, each about 12 to 14 inches long; double the foil if it seems flimsy.
- Pat the steak strips dry with paper towels, then place them in a large bowl.
- Sprinkle the Cajun seasoning over the steak and toss with clean hands or tongs until the strips are coated all over; let them sit for 10 to 15 minutes if desired.
- Lay the foil sheets flat and divide the seasoned steak evenly among them, piling each portion in the center and leaving room around the edges for sealing.
- Drizzle the melted butter evenly over the steak in all four packets.
- Bring the long sides of each foil sheet over the steak and fold them together several times, then fold and crimp the short ends to seal each packet completely with the seam on top.
- Place the packets seam-side up in the slow cooker, stacking lightly if needed while keeping them mostly in one layer or slightly overlapping.
- Cover and cook on LOW for 4 to 6 hours or on HIGH for 2 to 3 hours, using the shorter time for sirloin and the longer time for round steak.
- Carefully open one packet away from your face and hands; the steak should be cooked through, easy to cut with a fork, and reach at least 145°F internally. If needed, reseal it and cook for another 30 minutes before checking again.
- Turn off the slow cooker and use tongs to transfer the packets to plates or a platter. Open them at the table and spoon the buttery Cajun juices over the steak and any sides.