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 and stir gently until just combined. Small lumps are acceptable. Allow batter to rest for 5 minutes to thicken slightly.
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 bubbles form on surface and edges appear set, approximately 2-3 minutes. Flip and cook second side until golden brown, another 2-3 minutes.
06 - Combine 1/4 cup sugar and 2 teaspoons cinnamon in a small bowl. Mix thoroughly until uniform color achieved.
07 - Brush warm pancakes lightly with melted butter if desired. Press both sides into cinnamon sugar mixture while still warm for coating to adhere.
08 - Place chopped chocolate and cream in microwave-safe bowl. Microwave in 20-second intervals, stirring between each, until completely melted and glossy. Alternatively, heat in small saucepan over low heat, stirring constantly.
09 - Stack coated pancakes on serving plates. Drizzle warm chocolate sauce generously over top or serve alongside in small dipping bowl.