01 - Whisk together flour, sugar, baking powder, baking soda, salt, and cinnamon in a large 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 ingredients into dry ingredients and stir gently until just combined. Avoid overmixing; small lumps are acceptable. Let batter rest for 5 minutes to thicken slightly.
04 - Heat a non-stick skillet or griddle over medium heat. Lightly grease the surface with butter.
05 - Pour 1/4 cup batter per pancake onto the griddle. Cook until bubbles form on the surface and edges appear set, about 2-3 minutes. Flip and cook an additional 2-3 minutes until golden brown.
06 - Combine 1/4 cup sugar and 2 teaspoons cinnamon in a small bowl. Mix until uniform in color.
07 - Brush warm pancakes lightly with melted butter, then generously dust both sides with the cinnamon sugar mixture.
08 - Place chopped chocolate and cream in a microwave-safe bowl. Microwave in 20-second intervals, stirring between each, until chocolate is completely melted and sauce is smooth and glossy.
09 - Stack coated pancakes on plates. Drizzle warm chocolate sauce generously over the top or serve on the side for dipping.