01 - Whisk together flour, sugar, baking powder, baking soda, salt, and cinnamon in a large mixing bowl until evenly distributed.
02 - In a separate bowl, whisk milk, eggs, melted butter, and vanilla extract until fully incorporated and smooth.
03 - Pour wet mixture into dry ingredients. Stir gently until just combined; small lumps are acceptable. Allow batter to rest for 5 minutes.
04 - Heat non-stick skillet or griddle over medium heat. Lightly grease surface with butter.
05 - Pour 1/4 cup batter per pancake onto griddle. Cook until surface bubbles form and edges set, approximately 2-3 minutes. Flip and cook until golden brown, 2-3 minutes additional.
06 - Combine sugar and cinnamon in small bowl, mixing thoroughly until uniform color achieved.
07 - While pancakes are warm, lightly brush with melted butter if desired. Press both sides into cinnamon sugar mixture for even coating.
08 - Place chopped chocolate and cream in microwave-safe bowl. Heat in 20-second intervals, stirring between each, until completely smooth and glossy.
09 - Stack coated pancakes on plates. Drizzle warm chocolate sauce generously over top or serve alongside for dipping.