Preheat your waffle iron according to the manufacturer's instructions.

Unroll the crescent roll dough and separate it into four rectangles by pressing the seams together, ensuring there are no gaps.

Lightly grease the waffle iron with cooking spray or melted butter to prevent sticking.

Place one rectangle of dough in the center of the waffle iron and close the lid, cooking for about 3-5 minutes or until golden brown and crispy.

Carefully remove the croissant waffle and repeat with the remaining dough rectangles.

In a small bowl, whisk together the powdered sugar, milk, vanilla extract, and melted butter until smooth to create a glaze.

Drizzle the glaze over the warm croissant waffles and serve immediately with your favorite toppings, such as fresh fruit, whipped cream, or maple syrup.