In a bowl, mix flour, sugar, baking powder, baking soda, cinnamon, and salt.
In another bowl, whisk mashed sweet potato, milk, egg, vanilla, and melted butter.
Gradually mix dry ingredients into wet ingredients until smooth.
Heat a skillet over medium heat and grease lightly.
Pour batter onto the skillet, cooking for 2–3 minutes per side.
In a saucepan, whisk coffee, maple syrup, butter, cocoa, and salt.
Simmer for 3–5 minutes until slightly thickened.
Drizzle over pancakes and serve immediately.