My grandmother used to make this budget-friendly dinner every spring. Just 4 ingredients and the meat falls right off the bone. Full recipe

Lightly spray the inside of a large slow cooker with nonstick cooking spray for easier cleanup.

Scatter the thinly sliced onion evenly over the bottom of the slow cooker to create a bed for the ribs.

Pat the country-style pork ribs dry with paper towels and trim any large, excess pieces of fat if desired. Arrange the ribs in a single layer (or slightly overlapping) on top of the onions.

In a medium bowl or large measuring cup, stir together the barbecue sauce and cola or root beer until smooth and combined.

Pour the barbecue sauce mixture evenly over the ribs, lifting them slightly with a spoon or tongs so the sauce can run underneath and coat everything. Make sure the onions are mixed into the sauce a bit—they’ll soften and melt into the glaze as it cooks.

Cover the slow cooker with the lid and cook on LOW for 7 to 8 hours, or on HIGH for 3 1/2 to 4 hours, until the ribs are very tender and the meat is beginning to fall off the bone when gently pulled with a fork.

Once done, carefully remove the ribs with tongs or a slotted spoon—they’ll be very tender—letting any excess sauce drip back into the slow cooker. Stir the onions into the sauce so they’re well coated.

Serve the ribs hot, spooning plenty of the rich, dark red barbecue-onion sauce over the top. If desired, you can skim off any excess fat from the surface of the sauce before serving.

If you prefer a little heat, use a spicy barbecue sauce or add a pinch of crushed red pepper flakes into the sauce mixture before pouring it over the ribs. For a smokier flavor, choose a hickory or mesquite-style barbecue sauce, or add a tiny splash of liquid smoke (just remember that would technically add an extra ingredient). You can swap the cola or root beer for Dr Pepper or another dark soda you have on hand; each one gives a slightly different sweetness. To make cleanup even easier, use a slow cooker liner. If you like a thicker, stickier glaze, transfer the cooked ribs to a plate and pour the sauce and onions into a saucepan; simmer on the stove for 5 to 10 minutes to reduce before spooning it back over the meat. Leftovers keep well in the fridge for up to 3 days and can be shredded and mixed with the sauce for sandwiches, baked potatoes, or quick rice bowls on busy nights.