If your flower cookie cutter does not come with a center hole built in (mine did not), you can use various kitchen items to cut out the small circle in the center. The circles I cut were about 1/2 inch (1.25 centimeters) in diameter. Here is a list of my suggestions (affiliate links): The small end of a Wilton 1A Extra Large Round decorating tip (what I used, as I already have one. You can see it in the instruction photos.) The large end of a small metal decorating tip Extra small stainless steel round circle cutters (for baking, decorating and clay crafts) A sturdy, extra wide metal straw, such as a boba straw The narrow end of a funnel Get creative! Other ideas include the caps of marking pens or the lid of a chapstick container. If you use non-kitchen items, be sure to wash them well before use.