In a large bowl, whisk together the flour, brown sugar, baking powder, baking soda, cinnamon, nutmeg, cloves if using, and salt.
In another bowl, whisk together the mashed sweet potato, eggs, milk, sour cream, vanilla extract, maple syrup, and melted butter until mostly smooth.
Pour the wet ingredients into the dry ingredients and gently fold together until just combined. Do not overmix. Some small lumps are perfectly fine.
Let the batter rest for 5–10 minutes.
Heat a lightly buttered skillet or griddle over medium-low heat.
Scoop about 1/4 cup batter for each pancake onto the skillet.
Cook for 2–3 minutes until bubbles appear across the surface and the edges begin looking slightly dry and set.
Flip carefully and cook another 2–3 minutes until golden brown and fully cooked through in the center. Adjust heat lower if the pancakes brown too quickly.
Serve warm with whipped cinnamon butter, maple syrup, toasted pecans, whipped cream, or crispy bacon.