In a large mixing bowl, beat together butter and both sugars until creamy. Add egg and vanilla and stir until combined.
In a separate bowl, whisk together flour, salt and baking soda.
With the mixer on low, slowly add dry ingredients to wet. Mix until the dough comes together.
Stir in chocolate chips.
Turn dough out onto a piece of parchment paper and roll out to ¼ inch thickness.
Using a 4 inch round cookie cutter and cut out circles. Gently press each circle of cookie onto an upside down jumbo muffin tin. The dough will be drier than usual so you’ll have to be very gentle with it.