01 - Whisk together flour, sugar, baking powder, baking soda, salt, and cinnamon in a large 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 ingredients into dry ingredients and stir until just combined. The batter should remain slightly lumpy. Let rest for 5 minutes to thicken.
04 - Heat a non-stick skillet or griddle over medium heat. Lightly grease with butter using 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 to 3 minutes. Flip and cook until golden brown, another 2 to 3 minutes.
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, then generously dust both sides with cinnamon sugar mixture while still hot.
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 pancakes on plates and drizzle with warm chocolate sauce. Serve immediately with extra sauce on the side for dipping.