Preheat the oven to 400℉. Line a baking sheet with parchment paper or a baking mat for easier clean up.
Wash the sweet potatoes and then cut them in half from end to end and place them on the baking sheet.
Drizzle the olive oil over the cut potatoes. Use your hands or a pastry brush to coat the outside and cut side of each potato half with the olive oil completely.
Place the potatoes on the baking sheet cut side down and roast them in the hot oven until fork tender, 25-35 minutes.
Remove the potatoes from the oven and let them cool enough that they can be handled safely.
Use a spoon to scoop the soft sweet potato flesh from the skin and place it in a medium bowl.
Add the melted butter or coconut oil, salt, and ground cinnamon.
Use a fork or a potato masher to mash the sweet potatoes until they are smooth and creamy.
Add salt to taste. Serve warm.
Notes
These mashed sweet potatoes are roasted to make them extra sweet - I don’t recommend boiling them for this recipe.
If you want to make this recipe dairy-free or vegan, add coconut oil instead of butter to the potatoes when you are mashing them.
Make a double batch and use half to top a Shepherd’s Pie made with Thanksgiving leftovers.
This recipe can be made a couple days ahead of time and stored in a casserole dish with a cover and then reheated before serving.