Preheat your oven to 425°F and line two large baking sheets with parchment paper. Wash sweet potatoes thoroughly under cold running water, then pat completely dry with paper towels to remove surface moisture.

Peel and cut sweet potatoes into one-inch cubes, working quickly to prevent browning. Transfer cubed potatoes to a large mixing bowl and toss immediately with the olive oil until all pieces are evenly coated.

In a small bowl, combine salt, black pepper, garlic powder, paprika, cinnamon, and brown sugar. Sprinkle this spice mixture over the oiled potatoes and toss thoroughly, ensuring every piece receives seasoning coverage before spreading onto baking sheets.

Arrange this thanksgiving roasted sweet potatoes family recipe on prepared baking sheets in a single layer without crowding. Distribute fresh thyme sprigs across the top and dot with small butter pieces, then roast for 35-40 minutes until edges turn golden brown and a fork pierces centers easily.

Remove from oven and let cool for five minutes before transferring to a serving platter. Taste and adjust seasonings as needed, adding extra salt or cinnamon based on personal preference before serving warm.