Stir oatmeal and buttermilk together in a bowl
Cover and put in your refrigerator overnight.
The next morning, add eggs, sugar and melted buter. Stir well to combine.
Add flour, baking powder, soda, cinnamon, baking powder, and salt into oatmeal mixture.
Stir until just combined. (If batter seems too dry, add up to 3 T. additional buttermilk.)
Spoon 1/3 cup batter onto griddle for each pancake on a lightly greased hot griddle until bubbles appear and underside is golden brown. Cook until tops are bubbly and bottom is browned; flip and cook on the other side.
Cook until tops are bubbly and bottom is browned; flip and cook on the other side.
Top with your favorite toppings!