01 -
First things first, get those sweet potatoes peeled and chopped into 1-inch cubes. I usually boil them in a big pot of lightly salted water until they're fork-tender, about 15-20 minutes. You want them soft enough to mash easily, but not watery. This is where I sometimes forget the salt, and then the potatoes taste a little flat, so don't be like me!
02 -
Drain the potatoes well – super important! Then, transfer them to a large bowl. Add the melted butter, granulated sugar, beaten eggs, milk, vanilla, cinnamon, and nutmeg. Mash everything until it's mostly smooth. I like a few tiny lumps for texture, but you do you. Taste it here, and adjust the sweetness or spices if you feel it needs a little more love. This is the heart of our Old Fashioned Sweet Potato Casserole, so make it sing!
03 -
Pour the glorious sweet potato mixture into a 9x13 inch baking dish. Make sure it's evenly spread. I usually give the dish a little tap on the counter to settle everything. It just feels right. Preheat your oven to 375°F (190°C) while you're doing this. The anticipation, honestly, is half the fun!
04 -
Pop the dish into the preheated oven and bake for 20-25 minutes. You want the casserole to be heated through and and slightly set. This step ensures the base is warm and ready for its crowning glory. I usually peek in the oven around the 15-minute mark, just to make sure everything's looking good. Don't let it dry out too much!
05 -
Take the casserole out of the oven. Now for the fun part: scatter those mini marshmallows evenly over the top. Don't be shy! This is what makes it an Old Fashioned Sweet Potato Casserole. I've tried making pretty patterns, but honestly, just tossing them on works perfectly.
06 -
Return the casserole to the oven for another 5-10 minutes, or until the marshmallows are beautifully golden brown and gooey. Keep a close eye on them, because they can go from perfectly toasted to burnt in a flash! I’ve had more than one marshmallow topping disaster because I walked away for "just a second." Let it cool slightly before serving; those marshmallows are molten lava!