1. Preheat the oven to 375°F. Line a baking sheet with parchment paper.
2. In a standing electric mixer, cream the butter until smooth. Add the confectioners' sugar and cream until fluffy. Add the egg and vanilla extract. Slowly sift in the self-rising flour and beat until a smooth dough forms.
3. Add the dough to a cookie press and attach a star or flower-shape disk. Press the cookies onto the lined baking sheet, leaving 1 inch of space around each cookie.
4. Bake for 15 minutes, or until lightly golden on top. Transfer to a wire rack to cool completely before storing. The cookies can be stored at room temperature in an airtight container for 3 to 4 days.