FAQ
Are yams the same as sweet potatoes?
Often, no. In many US grocery stores, what is labeled “yam” is usually an orange-fleshed sweet potato variety that is marketed as a yam. True yams (dioscorea) can vary by type, but they are typically starchier and less sweet than sweet potatoes, and they can be harder to find. This recipe is written for the common orange-fleshed “yam” you see in stores because it turns creamy and sweet.
Do I have to peel the yams?
I recommend peeling for the smoothest, most classic texture. If you are using thin-skinned sweet potatoes and you like a more rustic vibe, you can leave the skin on. Just scrub well.
How do I keep them from turning mushy?
Cut even chunks, do not overbake, and use the covered then uncovered method. If your yams are very fresh and firm, they will hold shape better. If they are older, they soften faster, so start checking early once you uncover.
Can I make these ahead?
Yes. Bake fully, cool, refrigerate, then reheat covered at 350°F until hot, about 20 minutes. Uncover for the last 5 minutes to bring back the glossy finish.
Can I assemble this ahead and bake later?
I do not recommend assembling it unbaked. The glaze thickens as it sits, and you can end up with uneven coating and patchy caramelization. If you want a holiday-friendly shortcut, prep the yams (peel and cut) up to 1 day ahead and keep them submerged in cold water in the fridge. Make the glaze up to 2 days ahead and refrigerate. Then drain, dry, warm the glaze until pourable, and bake as written.
Can I reduce the sugar?
Absolutely. Drop the brown sugar to 1/3 cup and keep the butter the same. You will still get a rich glaze, just less candy-sweet.
Do I need marshmallows?
No. This recipe is all about spiced, buttery caramel vibes. If you love marshmallows, you can add them for the last 5 minutes of baking, but the yams are already doing the most.
Can I make it dairy-free?
Yes. Swap in a good vegan butter. The glaze will still turn glossy and clingy, just with a slightly different (but still delicious) richness.