Mix together the sugar, milk powder, and xanthan gum in a bowl.
In a saucepan, combine the light corn syrup and milk. Whisk until fully combined. Pour in the sugar mixture. Whisk vigorously, until sugar is dissolved.
Set the pot over medium heat and bring up just to a simmer, whisking occasionally. Remove from heat. Add the heavy cream and whisk to combine.
Pour the mixture into a large airtight container. You’ll be adding the chocolate to this mixture in the next step.
To make the chocolate sauce, combine sugar, water, cocoa powder, and malted milk powder in a saucepan over medium heat. Whisk and simmer on low heat until dissolved and smooth. Remove from heat and let cool.
Once cooled, pour the chocolate syrup into ice cream base and mix it well, with a whisk or an immersion blender. Refrigerate the mixture overnight.
Make sure your ice cream maker bowl is in the freezer!
When ready to churn, pour the ice cream mixture into the ice cream maker and churn until the ice cream reaches soft serve stage.
Pour the Whoppers candies into the ice cream maker and churn just until they are all incorporated, about 30 seconds. Turn off the machine.
Quickly scoop out the ice cream into a freezer container. Freeze until firm, at least 4 hours.