Start off by cutting the butter into cubes and then place it in your light coloured pan.
Once is has melted, it will start creating bubbles. At this point, you'll need to pay close attention to the pan and not let it out of your sight.
Once the bubbles start to clear, foam will be created, and the look of golden brown will appear, followed by the nutty/toasty aroma. This means your butter is now ready.
I recommend transferring the butter to a different plate and then leaving it to cool in room temperature, before using it.