In a mixing bowl, whisk together Bisquick baking mix, egg, vanilla extract, and nonfat milk until smooth.

Preheat a frying pan over medium-low heat, lightly greasing it to prevent sticking.

Pour about 1/8 cup of batter into the pan, swirling gently to form a thin circle. Cook until bubbles form, then flip and cook until golden.

In a small bowl, combine sugar and cinnamon. Adjust to taste.

Spread a thin layer of butter on each warm pancake, sprinkle with cinnamon sugar, and roll them up.

Serve warm, optionally adding more cinnamon sugar or syrup.