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