Preheat the oven to 350°F. Line baking sheets with parchment paper.

In a large bowl, cream together the butter and sugar until light and fluffy.

Beat in the egg and vanilla extract until well combined.

Gradually mix in the flour until just combined.

Drop spoonfuls of dough onto prepared baking sheets.

Bake for 15-20 minutes, or until edges are golden brown.

Remove from oven and let cool on wire racks.