Prepare the ingredients for the salted caramel sundae. Cool the cream.
Start making salted caramel. Measure 50 g of sugar, place in a saucepan, melt over low heat until golden brown, tilting the pan in different directions. Add the remaining sugar in 50 g portions and melt it in the same way. Add oil and salt.
Fold the cream into the caramel. Separately, bring the cream to a boil. Pour into the caramel in parts, stirring constantly. Place on high heat. Bring to a boil. Cook for 6-8 minutes. Pour the finished caramel into a separate container and refrigerate for 7-8 hours.
Make a sundae. Start whipping the cream on low speed for 1-2 minutes, then increase the speed and beat until stiff peaks form. Add condensed milk, mix with a whisk until smooth. Place in a container with a lid. Place in the freezer for 4-5 hours.
Place the finished ice cream in bowls, pour over salted caramel, and sprinkle with walnuts.