01 - In a large mixing bowl, whisk together the flour, sugar, baking powder, baking soda, salt, and ground cinnamon until well combined.
02 - In a separate bowl, whisk the milk, eggs, melted butter, and vanilla extract until fully blended and smooth.
03 - Pour the wet mixture into the dry ingredients. Fold gently until just combined; the batter should remain slightly lumpy. Allow to rest for 5 minutes to thicken.
04 - Heat a non-stick skillet or griddle over medium heat. Lightly grease the surface with butter.
05 - Pour 1/4 cup of batter per pancake onto the heated surface. Cook until bubbles form across the top and edges appear set, approximately 2 to 3 minutes. Flip and cook until golden brown on the second side, 2 to 3 minutes longer.
06 - While pancakes cook, combine the granulated sugar and cinnamon in a small bowl. Mix thoroughly until evenly blended.
07 - Brush warm pancakes lightly with melted butter, then press both sides into the cinnamon sugar mixture to coat evenly.
08 - Place chopped chocolate and heavy cream in a microwave-safe bowl. Microwave in 20-second intervals, stirring between each, until completely melted and glossy.
09 - Stack coated pancakes on serving plates. Drizzle generously with warm chocolate sauce or serve sauce alongside for dipping.