Prepare the sweet potatoes: Peel and grate the sweet potatoes using a box grater or food processor. Place the grated sweet potatoes in a clean kitchen towel and squeeze out as much moisture as possible.

Mix the batter: In a large bowl, combine the grated sweet potatoes, grated onion, beaten eggs, flour, salt, black pepper, and ground cinnamon. Mix well until all ingredients are evenly incorporated.

Heat the oil: In a large skillet, heat about 1/4 inch of vegetable oil over medium-high heat until shimmering but not smoking.

Form and fry the latkes: Take a heaping tablespoon of the sweet potato mixture and flatten it into a small patty. Carefully place it in the hot oil. Repeat with more mixture, being careful not to overcrowd the pan.

Cook until golden: Fry the latkes for about 3-4 minutes per side, or until golden brown and crispy. Transfer to a paper towel-lined plate to drain excess oil.

Serve warm: Arrange the latkes on a serving plate and drizzle with warm maple syrup. Enjoy immediately while crispy.