01 - In a large mixing bowl, whisk together all-purpose flour, granulated sugar, baking powder, baking soda, salt, and ground cinnamon until evenly combined.
02 - In a separate bowl, whisk together whole milk, large eggs, melted unsalted butter, and vanilla extract until fully incorporated and smooth.
03 - Pour the wet ingredients into the dry mixture and stir gently until just combined. Avoid overmixing to maintain fluffy texture. Allow batter to rest for 5 minutes.
04 - Heat a non-stick skillet or griddle over medium heat. Lightly grease the surface with additional unsalted butter to prevent sticking.
05 - Pour approximately 1/4 cup of batter per pancake onto the preheated griddle. Cook until bubbles form on the surface and edges appear set, then flip and continue cooking until golden brown, about 2-3 minutes per side.
06 - While pancakes cook, combine granulated sugar and ground cinnamon in a small bowl, mixing thoroughly until uniform in color.
07 - Brush warm pancakes lightly with melted butter, then generously dust both sides with the prepared cinnamon sugar mixture while still warm.
08 - Place chopped dark chocolate and heavy cream in a microwave-safe bowl. Heat in 20-second intervals, stirring between each, until chocolate is completely melted and mixture becomes smooth and glossy.
09 - Stack coated pancakes on serving plates. Drizzle warm chocolate sauce generously over the top or serve alongside in a small dipping bowl.