Add the white chocolate to a smooth baking sheet in an even layer.
Bake the white chocolate for 10 minutes.
Remove from the oven and use an off-set spatula or rubber spatula to stir the white chocolate thoroughly, and spread back into an even layer.
Repeat these 10 minute baking and stirring increments 6-7 times until the white chocolate has reached an even, light golden color.
Pour the melted caramelized white chocolate into chocolate bar molds or onto parchment paper.
Chill the chocolate for about 30 minutes, then remove and turn out of the molds or if on parchment paper break into small pieces.
Notes
I highly recommend using an internal oven thermometer to ensure your oven maintains the correct temperature.
If your oven has a hard time maintaining such a low temperature without over-heating, then leave the oven door cracked and check on the temperature frequently.
Be sure to spread the white chocolate back into an even layer (but not too thin) after each interval to ensure even baking.
After the first few intervals, the white chocolate will be a very light golden color and produce some lumps. When this happens, just take a few extra minutes to stir and smooth out with a rubber spatula, and it will return to its silky smooth state.