01 - Whisk together flour, sugar, baking powder, baking soda, salt, and cinnamon in a large mixing 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 fold gently until just combined. The batter should remain slightly lumpy. Let rest for 5 minutes to allow leavening to activate.
04 - Heat a non-stick skillet or griddle over medium heat until hot. Lightly grease with additional butter.
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 on second side, another 2-3 minutes.
06 - Combine 1/4 cup sugar and 2 teaspoons cinnamon in a small bowl, mixing thoroughly until uniform.
07 - While pancakes are still warm, brush lightly with melted butter, then dredge both sides in the cinnamon sugar mixture until evenly coated.
08 - Place chopped chocolate and 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 and drizzle with warm chocolate sauce or serve sauce on the side for dipping.