Place your double cream, condensed milk and vanilla extract into large bowl.
Using an electric mixer (I use my stand mixer but you could use an electric hand mixer) mix the ingredients together until all combined on a low speed.
Increase the speed of your mixer and continue to mix until it thickens quite a bit and is a little more stiff.
Carefully fold through your chocolate chips and some of your cookie dough (it should be chilled and firm). I just pull chunks off my cookie dough and add them.
Spoon your ice cream into a suitably sized freezer safe tub (I use a tupperware box but you could easily use a loaf tin) As you spoon it in, add some chunks of cookie dough throughout so theres plenty layered in there. If you wanted to add any caramel sauce in too you'd swirl it in at this stage (a couple of heaped tbsp would be enough).
Once you've filled your tub and layered in your cookie dough you can add any extra bits of cookie dough to the top as well as any chocolate chips, press them down.
Cover your tub/tin with a lid or cling film and place in the freezer for a few hours until set frozen. My freezer took 3 hours but it can vary.
When its frozen, remove from the freezer 5-10 mins before you want to eat it as it might be quite frozen! Make sure you check though as it could be the perfect texture and it might not need to.
Serve up in a gluten free cone or in a bowl. Optionally drizzle with caramel or chocolate sauce and add any extra cookie dough (rolled into balls) to the top! Enjoy! Once frozen for more than 24 hours, you may need to remove it from the freezer 10 minutes before serving, giving it time to soften up a little.