In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
In a separate bowl, mix milk, vinegar, egg, and melted butter.
Combine the wet ingredients with the dry ingredients and stir until just mixed.
Make the Cinnamon Swirl:
In a small bowl, mix brown sugar, melted butter, and cinnamon until smooth.
Cook the Pancakes:
Preheat a non-stick skillet or griddle to medium heat. Grease lightly with oil or butter.
Pour 1/3 cup of batter onto the skillet for each pancake.
Add a small spoonful of the cinnamon swirl mixture to the center of each pancake and swirl gently with a toothpick.
Cook for 1-2 minutes until bubbles form on the surface. Flip carefully and cook for another 1-2 minutes until golden.
Serve:
Serve warm with cream cheese glaze, maple syrup, or your favorite toppings.
Notes
Let the batter rest for 5-10 minutes before cooking to ensure fluffier pancakes.
Optional toppings: fresh fruits, nuts, whipped cream, or a sprinkle of cinnamon.
Store leftover pancakes in an airtight container in the fridge for up to 3 days, or freeze for up to 2 months. Reheat in the microwave for 30 seconds or in a toaster.