Dries: In a small bowl, stir together the flour, sugar, baking powder, salt, and cinnamon.
Wets: In a separate large bowl, stir together beer, egg, oil, and vanilla.
Mix: Add the dry ingredients to the wet ingredients, stirring just until combined (it’s okay if the batter is a little lumpy).
Cook: Heat a large nonstick skillet over medium heat. Pour batter into skillet, using about ¼ cup for each pancake. Cook 3 to 5 minutes on each side, or until lightly browned. Serve warm with your favorite pancake toppings.