Pumpkin Spiced Donuts with Bourbon Caramel Glaze

In a large saucepan heat sugar over medium high heat. Keep and eye on the sugar, do not leave it unattended. As the sugar melts swirl the pan from side to side. Do this often to help the sugar melt evenly. Continue to melt and slowly swirl from side to side until the sugar is a rich amber color. Remove from heat, add butter and heavy cream. Be careful, the glaze will bubble. Whisk until fulling incorporated and smooth. Return to a low heat, add bourbon and whisk while cooking for another 2 minutes. Set aside to cool.