This 4-ingredient slow cooker flag day potatoes recipe is my kind of busy-day cooking: toss raw unpeeled whole russet potatoes into the slow cooker with just three pantry staples, flip it on, and come home to a cozy, buttery, herby potato side that tastes like you fussed.
I started making this on summer flag holidays when I didn’t want to turn on the oven, and it’s become a year-round staple for nights when work runs late but I still want something that feels like a real, from-scratch meal. The potatoes cook up tender and flavorful, and you can serve them as-is or smash them a bit right in the slow cooker for extra goodness.
Serve these slow cooker flag day potatoes straight from the crock with grilled chicken, burgers, or brats, plus a simple green salad or steamed veggies. They’re also great alongside meatloaf, roast beef, or pulled pork sandwiches.
Spoon some of the buttery garlic-herb mixture over the top of each potato, and if you want to dress things up, add a dollop of sour cream or Greek yogurt and a sprinkle of shredded cheese or chopped green onions at the table.
4-Ingredient Slow Cooker Flag Day Potatoes
Servings: 6
Ingredients
3 pounds small to medium russet potatoes, raw, unpeeled, whole (about 8–10 potatoes, scrubbed well)
Directions
Scrub the russet potatoes well under cool running water, using a brush or your hands to remove any visible dirt from the skins. Do not peel or cut them; leave the potatoes whole. Pat them dry with a clean towel so excess water doesn’t pool in the slow cooker.
Place the raw, unpeeled, whole russet potatoes in a single, snug layer in the bottom of a 4- to 6-quart slow cooker. If you need to stack a few on top, that’s fine; just keep the majority touching the bottom so they cook evenly.
Sprinkle the kosher salt and garlic powder evenly over the potatoes. Try to distribute the seasonings so each potato gets a bit of coverage. Drop the butter pieces over and around the potatoes so they can melt down and coat everything as they cook.
Cover the slow cooker with the lid, making sure it fits tightly so steam doesn’t escape. Cook on HIGH for 3 1/2 to 4 1/2 hours, or on LOW for 6 to 7 hours, until the potatoes are very tender when pierced with a fork or skewer. The exact time will depend on the size of your potatoes and your specific slow cooker.
Once the potatoes are tender, use tongs to gently roll them around in the melted butter and seasonings that have collected at the bottom of the slow cooker, coating the skins. If desired, lightly press each potato with the back of a spoon or a fork right in the slow cooker to crack the skins a bit so some of the buttery mixture seeps inside.
Taste one potato and add a pinch more salt if needed, tossing gently to distribute. Serve the potatoes hot straight from the slow cooker, spooning some of the buttery garlic mixture over each portion. Keep the slow cooker on WARM if you’re serving over a couple of hours.
Variations & Tips
To switch up the flavor, add 1 teaspoon dried Italian seasoning or dried parsley with the salt and garlic powder for an herby version, or 1/2 teaspoon smoked paprika for a subtle smoky note that’s perfect with grilled meats. For cheesy potatoes, sprinkle 1 to 1 1/2 cups shredded cheddar or Monterey Jack over the cooked potatoes, cover, and let it melt on LOW or WARM for about 10 minutes before serving.
You can also top individual servings with sour cream, Greek yogurt, crumbled bacon, or chopped green onions to make them feel more like loaded baked potatoes. If you prefer a lighter option, swap half the butter for 2 tablespoons olive oil, drizzled over the potatoes before cooking.
For meal prep, cook a full batch and refrigerate leftovers in an airtight container for up to 4 days; reheat in the microwave or in a covered dish in a 350°F oven until warmed through. For food safety, always start with clean, firm potatoes and scrub the skins thoroughly since you are leaving them unpeeled.
Do not cook these on a warm setting from the start—use HIGH or LOW only—so the potatoes move through the temperature “danger zone” (40°F–140°F) quickly. Avoid leaving cooked potatoes at room temperature for more than 2 hours (1 hour if it’s very warm) to reduce the risk of bacterial growth, and refrigerate leftovers promptly. If any potatoes have green patches or sprouting eyes, cut those off generously before cooking, or discard heavily green or shriveled potatoes.
