Preheat the oven to 375℉ and line 2 baking sheets with parchment paper.

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

In a large bowl with an electric mixer, beat together the sugar and butter until smooth and creamy. Beat in the eggs, one at a time. Beat in the vanilla extract. Gradually, beat in the flour one spoonful at a time. Beat until it forms a cohesive dough.

Drop dough balls on the cookie sheets. The balls should be about the size of a walnut, and place them 2" apart. Bake for 8-10 minutes, until the edges are golden but the center is still soft. Cook the baking sheets on baking racks for 5 minutes. Then remove the cookies to wire racks to cool.

Note: Instead of making round cookies, you could roll out the dough on a lightly floured counter and use your favorite cookie cutters.