Adapted from Nigella Lawson
1/2 cup sugar
In a small saucepan off the heat, combine the sugar and corn syrup and stir together. Place over medium high heat. Do not stir. Allow the sugar and corn syrup to melt together and begin to bubble and darken - about 3-5 minutes.
Remove the pan from the heat and immediately whisk in the baking soda. The mixture will bubble and turn light gold. Quickly pour the mixture onto a piece of parchment paper.
Allow to cool for at least 30 minutes, then break up into shards and enjoy.