In a large bowl, beat on high speed heavy whipping cream until thick, stiff peaks form.
Add sweetened condensed milk and extract and beat on low until combined.
Stir in optional ingredients as desired like nuts, chocolate chips, caramel syrup, candy bar chunks, etc!
Transfer mixture to a freezer-safe contain with lid and freeze for at least 2 hours. 3+ for a more solid ice cream.*
Scoop and serve!
Video
Notes
*Depending on a variety of factors, your ice cream may require additional freezer time. If your ice cream is still not firm after 3 hours, try leaving in the freezer overnight or for at least 8 hours.