Heat 2 cups of the half and half with the sugar until hot and sugar has dissolved, but don't let boil. Remove from heat and whisk in the dulce de leche until completely melted. Add remaining half and half and vanilla extract and cool in the refrigerator completely. Freeze in an ice cream machine according to manufacturer's directions, then freeze completely in the freezer. Serve optionally garnished with chopped hazelnuts.
Recipe by Cooking With MicheleĀ® at https://cookingwithmichele.com/2011/09/dulce-de-leche-ice-cream-with-chocolate-cookies/