To Hell with heavenly cool ice cream sundaes! Bring the heat with our Fireball Whiskey ice cream sundae. 1.5 C. Sugar 3 Tbsp Corn Syrup 0.5 C. Heavy Cream 2 Tbsp Butter Mix your sugar an corn syrup in a pot over a medium heat until it reaches an even consistency then remove from heat. Warm up your heavy cream and add it to the mix along with your butter. Place back on a medium heat then melt evenly.