Preheat oven to 350°F.

In a large bowl, whisk together flour, baking soda, baking powder, and salt. Set aside.

In a separate bowl, cream together softened butter and 1 1/4 cups sugar until light and fluffy.

Beat in egg and vanilla extract until well combined.

Gradually blend in the dry ingredients until just mixed.

Roll dough into tablespoon-sized balls, then roll in remaining 1/4 cup sugar.

Place on parchment-lined baking sheets, spacing about 2 inches apart.

Bake for 10-12 minutes, until edges are lightly golden.

Let cool on baking sheet for 5 minutes, then transfer to a wire rack to cool completely.