Preheat the waffle iron to medium-low heat and spritz with cooking spray.
If using frozen croissant dough, roll the thawed dough in sugar before cooking. Place on the waffle iron and cook until golden brown.
If using crescent roll dough, roll out the dough and add desired filling. Roll into a croissant shape and cook in the waffle iron until golden brown.
If using puff pastry dough, cut out triangles, add filling, roll into a croissant shape, and cook in the waffle iron until golden brown.
