My sister shared this 4 ingredient secret with me for busy spring nights. Wrap these up and let the slow cooker do the rest for a perfect tender bite.

This slow cooker 4-ingredient beef and snap pea foil packets recipe is straight from my sister’s busy-weeknight playbook. On those chilly-but-sunny spring evenings when the kids have practice, work runs late, and you’re tempted to grab takeout, these tidy little packets save the day. You toss everything into foil, seal them up, and let the slow cooker quietly work in the background. The soy sauce and beef juices steam the snap peas until crisp-tender, and the beef comes out ridiculously soft without you hovering over the stove. It’s simple, comforting Midwest cooking with just enough freshness to feel springy.

Serve each foil packet right out of the slow cooker, opening it carefully to release the steam. Spoon the beef and snap peas over hot cooked white or brown rice, quinoa, or even buttery egg noodles to soak up the savory soy juices. A quick side salad with a bright vinaigrette or some sliced cucumbers tossed in rice vinegar balances the richness nicely. If you want to keep dishes minimal, just add a lime wedge or sprinkle of sesame seeds at the table and eat straight from the foil packet on a plate.

Servings: 4

1 1/2 pounds beef sirloin or flank steak, thinly sliced across the grain

Lay out 4 large sheets of heavy-duty aluminum foil (about 12 x 12 inches each) on your counter. If using regular foil, double-layer each sheet so the packets don’t tear.

In a large bowl, toss the thinly sliced beef with the olive oil until lightly coated. This helps keep the meat tender and prevents it from sticking to the foil.

Add the trimmed snap peas to the bowl with the beef and gently toss together so the peas are mixed evenly with the meat.

Drizzle the soy sauce over the beef and snap peas and toss again until everything is evenly coated. The mixture should look glossy and lightly saucy, not swimming in liquid.

Divide the beef and snap pea mixture evenly among the foil sheets, piling it in the center of each sheet and making sure some of the soy sauce drizzles over each portion.

Fold each foil sheet up into a tightly sealed packet: bring two opposite sides together and fold down several times to seal, then fold in the remaining sides securely so no juices can escape. You want compact, well-wrapped packets.

Place the foil packets seam-side up in a single layer in the bottom of your slow cooker. If needed, stand a packet slightly on its side so they all fit, but avoid stacking more than two layers.

Drizzle any soy sauce left in the bowl over the tops of the foil packets in the slow cooker. This will run down the sides and add extra flavor as they cook.

Cover the slow cooker with the lid and cook on LOW for 4 to 5 hours, or on HIGH for 2 to 2 1/2 hours, until the beef is tender and the snap peas are crisp-tender. Cooking times can vary slightly depending on your slow cooker and how thinly the beef is sliced.

Using tongs, carefully lift the foil packets out of the slow cooker and place them on plates or a baking sheet. Open each packet slowly, facing it away from you to avoid the hot steam.

Serve the beef and snap peas straight from the foil packets or transfer to bowls, spooning any accumulated juices over the top. Pair with rice, noodles, or your favorite grain if desired.

To bulk this up without adding more true ingredients, serve over whatever starch you have on hand—leftover rice, frozen microwave rice, egg noodles, or even mashed potatoes. If you want a little extra flavor but still keep it simple, you can sprinkle on pantry basics after cooking, like black pepper, red pepper flakes, or sesame seeds, which many home cooks don’t count toward the core ingredient list. For more veggies, tuck a few thinly sliced carrots or bell pepper strips into each packet along with the snap peas; just keep pieces small so they cook through at the same time as the beef. If you prefer a sweeter glaze, you can whisk a spoonful of brown sugar or honey into the soy sauce before tossing with the beef and snap peas. For food safety, always slice the beef on a clean cutting board with a clean knife, and wash your hands and any surfaces that touched raw meat before assembling the foil packets. Make sure the packets are tightly sealed so juices don’t leak into the slow cooker and to ensure even steaming. The beef should reach a safe internal temperature of at least 145°F; in practice, it will usually be well above this after several hours in the slow cooker. Refrigerate any leftovers within 2 hours, store them in airtight containers, and reheat thoroughly before eating.