In a large bowl combine the flour, baking powder, salt, sugar, and cinnamon. Mix well.
Pour the mixture into a quart sized mason jar and seal.
When ready to make the pancakes remove 1 3/4 cups of mix from the jar and put it in a large mixing bowl. Add in the milk, egg, and butter and whisk until smooth.
Heat a skillet over medium high heat and spray with cooking spray.
Pour 3 tablespoons of batter in 3 different places to make 3 round pancakes. Cook for 2-3 minutes per side or until they are cooked through. Repeat with remaining batter.