In a bowl, mix grated sweet potatoes, flour, egg, cinnamon, salt, pepper, green onions, and garlic powder until combined.
Heat vegetable oil in a pan over medium heat.
Scoop tablespoon-sized portions of the mixture into the hot oil and flatten slightly.
Fry each fritter for 3–4 minutes per side until crispy and golden.
Remove and drain on paper towels.
For the dip, whisk together Greek yogurt, coffee, honey, vanilla, and cinnamon until smooth.
Serve warm fritters with the coffee dip on the side.
Dunk, devour, and repeat.