Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper or foil for easy cleanup.
Scrub the sweet potatoes under running water, pat them dry, and cut into even 1-inch cubes (peel if preferred for a smoother texture).
In a large bowl, toss the cubes with the olive oil, salt, pepper, and any optional seasonings until evenly coated.
If using the optional infused butter, mix it in here for added richness.
Spread the seasoned sweet potatoes in a single layer on the baking sheet, ensuring they're not overcrowded.
Roast in the preheated oven for 25-35 minutes, flipping halfway through with a spatula, until the edges are golden and crispy and the centers are tender when pierced with a fork.
Remove from the oven, let rest for 1-2 minutes, and serve hot, drizzle with any remaining infused butter if you included it.