Gradually add flour and baking powder. Mix until combined. The dough will be sticky and heavy
Heat pizzelle iron and lightly grease with cooking spray. Use a paper towel to wipe off excess oil.
Drop dough in 1 tablespoon balls in the center of the iron. We use two spoons but you could also use a small cookie scoop. Shut iron and lock for 10-30 seconds. (Your iron may take less or more time, you'll have to test!) They should be golden brown
Open and remove cooked pizzelles by using a fork or butter knife to avoid burning your hands.
Place cookies on cooling racks to cool - do not stack them until they are completely cooled. Do not put them on a baking sheet, they need to be on a cooling rack so the steam can evaporate.
They will be slightly floppy when they come off the iron but they will crisp up!