Melt butter in a sauce pan then add sugar, water and egg yolk. Just when it boils add the Whiskey and remove from the heat. Stir it for about a minute letting it cool. Let it cool about 2 minutes (it will start to thicken) then pour over the bread pudding.
Note for BBQ Competition cooking on the pit
This is for six small individual cakes. Forget the nuts and use small foil cake cups. Butter cake cups inside then lightly add brown sugar to the sides and bottom of the foil cup. Cover bottom with raisins then pour in mixture. Can also use peaches from a can if you do not want to use raisins. Peaches make this taste like a peach cobbler. Be sure to butter the foil that you now use to cover the top of the small cake cups. At the back end of the pit, at about 275 degrees, cook for about an hour. Remove foil and flip cake out onto plate (small side on top). Cover with sauce and serve immediately.
Be sure to double the sauce recipe for this type of competition as you will simply want to really have a lot of sauce on each cake.