Vanilla ice cream with homemade condensed milk

Have you ever made that ice-cream sandwich slice where you mix together condensed milk, whipped cream and a crushed chocolate bar, and sandwich it between two layers of malt biscuits? I love it every time, despite the fatty layer it leaves on the roof of your mouth. :D This is that recipe, with a homemade fructose-free condensed milk... minus the chocolate bar and biscuits, but still with the roof-of-the-mouth coating. If you give this a try, hopefully you'll agree with me that it proves it's not just the chocolate and biscuits that make it so good. 

Make condensed milk:

• 1/2 cup cold water
• 1 1/3 cups dry milk powder (unsweetened. Maybe double-check that yours is gluten-free if you need that. My Coles brand milk powder lists only milk and soy emulsifier in the ingredients.)
• 2/3 cup dextrose (NOTE: I have updated this from 3/4 cup to 2/3 cup as it was very sweet.)
• 1 teaspoon vanilla extract

 Stir milk into cold water.

Microwave on high 45 seconds to 1 minute until steaming, then stir in dextrose & vanilla.

Refrigerate till cool before using.

You can use this condensed milk for other recipes, but I haven't tried it yet myself. It does seem much thinner than the canned stuff. 

After chilling, add

600ml thickened cream

Whip cream and condensed milk together until thick, then transfer to sealed container (at least 1.5L) and freeze.