Start by preheating your oven to 375 degrees F (190 degrees C) to ensure it's ready for baking.

In a small bowl, whisk together the flour, baking soda, and baking powder.

In a large bowl, cream the softened butter and sugar with an electric mixer until the mixture is smooth and creamy. Then, beat in the egg and vanilla extract until fully incorporated.

Gradually add the dry ingredients to the wet mixture, blending well to form a soft dough. Shape the dough into walnut-sized balls and place them 2 inches apart on ungreased baking sheets.

Bake the cookies in the preheated oven for 8 to 10 minutes, or until the edges turn a lovely golden color. Once done, let them cool on the baking sheets for a few minutes before transferring to a wire rack to cool completely.