Preheat the oven to 375 degrees F (190 degrees C).
Stir flour, baking soda, and baking powder together in a small bowl.
Beat sugar and butter together in a large bowl until smooth.
Add in egg and vanilla.
Add flour mixture in small increments.
Roll dough into walnut-sized balls (or use cookie scoop) and place 2 inches apart onto ungreased baking sheets.
Note: I dipped the dough into sanding sugar before placing them on the baking sheets.
Bake in the preheated oven until edges are just golden, 8 to 10 minutes. Cool on the baking sheets briefly before removing to a wire rack to cool completely.
