Preheat the oven to 425°F and line a large baking sheet with parchment paper.
Peel the sweet potatoes and slice them into 1/4-inch thick rounds.
Use a small paring knife to carve simple jack-o'-lantern faces into each round.
Place the carved rounds in a mixing bowl and drizzle with olive oil.
Sprinkle the smoked paprika, garlic powder, salt, cinnamon, and black pepper over the slices.
Toss gently until every piece is evenly coated.
Arrange the slices in a single layer on the prepared baking sheet.
Bake for 20 to 25 minutes, flipping halfway through, until the edges turn golden and crisp.