01 - Whisk together flour, sugar, baking powder, baking soda, salt, and cinnamon in a large bowl until well combined.
02 - In a separate bowl, whisk milk, eggs, melted butter, and vanilla extract until fully blended and smooth.
03 - Pour wet ingredients into dry ingredients and mix until just combined; small lumps are acceptable. Let batter rest for 5 minutes to allow baking powder to activate.
04 - Heat a non-stick skillet or griddle over medium heat and lightly grease with butter.
05 - Pour 1/4 cup of batter per pancake onto the griddle. Cook until bubbles form on the surface and edges appear set, then flip and cook until golden brown, approximately 2–3 minutes per side.
06 - Combine 1/4 cup sugar with 2 teaspoons cinnamon in a small bowl, mixing thoroughly to create an even coating mixture.
07 - While pancakes are still warm, brush lightly with melted butter if desired, 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 interval until chocolate is completely melted and sauce becomes smooth and glossy.
09 - Stack pancakes on serving plates and drizzle with warm chocolate sauce, or serve sauce on the side for dipping.