01 - Whisk together flour, sugar, baking powder, baking soda, salt, and cinnamon in a large bowl until evenly combined.
02 - In a separate bowl, whisk milk, eggs, melted butter, and vanilla extract until fully incorporated and smooth.
03 - Pour wet ingredients into dry ingredients and fold gently until just combined. Small lumps are acceptable. Let batter rest for 5 minutes to hydrate.
04 - Heat a non-stick skillet or griddle over medium heat until hot. Lightly grease with butter, wiping excess with a paper towel.
05 - Pour 1/4 cup batter per pancake onto the griddle. Cook until bubbles form on surface and edges appear set, about 2-3 minutes. Flip and cook until golden brown, 2-3 minutes more.
06 - Combine 1/4 cup sugar and 2 teaspoons cinnamon in a small bowl. Mix thoroughly until evenly blended.
07 - Brush warm pancakes lightly with melted butter. Press both sides into the cinnamon sugar mixture or sprinkle generously to coat evenly.
08 - Place chopped chocolate and cream in a microwave-safe bowl. Microwave in 20-second intervals, stirring between each, until completely smooth and glossy.
09 - Stack coated pancakes and drizzle with warm chocolate sauce. Serve immediately with additional sauce on the side for dipping.