Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a bowl, cream together softened butter and sugars until fluffy. Add the egg and vanilla extract; mix until combined.

In another bowl, whisk flour and baking soda. Gradually add this to the wet mixture until just combined.

Drop spoonfuls of dough on prepared sheets, spacing them apart.

Bake for 10-12 minutes until golden around the edges but soft in the center. Let cool slightly before transferring to wire racks.

Melt chocolate chips in increments in the microwave until smooth. Dip each cooled cookie halfway into melted chocolate and place back on parchment to set.