Melted butter, one bowl, nine minutes in the oven.
Preheat the oven to 175°C and line a baking tray with baking paper.
Mix the melted butter and both sugars in a bowl until smooth.
Add the egg and vanilla and whisk until the mixture looks creamy.
Add the flour, baking soda and salt and fold gently until just combined.
Add the chocolate chips and mix lightly.
Scoop the dough into 8–10 balls, place on the tray and press extra chips on top.
Bake for 9–11 minutes, until the edges are golden but the centre still looks soft.
Cool on the tray for 5–10 minutes, then move to a rack — or eat warm.