Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.

Add the egg and vanilla extract, mixing until well combined.

In a separate bowl, whisk together the flour, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the chocolate chips.

Using a cookie scoop, drop dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake for 10-12 minutes or until the edges are lightly golden but the centers are still soft.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack.

In a mixing bowl, beat together the softened butter, powdered sugar, heavy cream, and vanilla extract until smooth and creamy.

Once the cookies are completely cooled, spread or pipe the frosting on top of each cookie.