2tbspgolden syrupyou could use corn syrup or molasses instead
In a medium saucepan (the saucepan needs to be large as the sugar will expand) place the sugar, golden syrup and vinegar.
Melt the sugar on medium heat and let it come to a boil.
Boil the mix on medium low heat for about 2-3 minutes, or until it reaches "Hard crack" stage (which will be at 300 F), or until a drop of sugar when dropped in cold water will form a hard ball. The sugar mix will be a thick bubbly liquid.
Remove the sugar mix from the heat and add the baking soda and whisk immediately. The sugar will start to expand and bubble up.
Pour the sugar mass onto a parchment paper and leave it to harden for about 30 minutes.
Break it into smaller pieces with your hands or crush it using a rolling pin.