Bottom layer:
Thoroughly grease a baking pan. Melt ingredients together in a saucepan or microwave, then pour into the baking dish and spread until even. Let cool and harden completely.
Melt butter in a saucepan over medium heat. Add in sugar and milk, stirring until dissolved and bring to a boil. Let cook for 5 minutes, stirring occasionally. Add in fluff, peanut butter and vanilla, stirring until smooth. Turn off heat and fold in peanuts, then pour over bottom chocolate layer. Let cool completely.
Caramel:
Combine ingredients in a saucepan over low heat. Let melt, stirring occasionally, until smooth. Pour over nougat layer and let cool completely.
Chocolate:
Melt ingredients together in a saucepan or microwave, then pour over caramel and spread until even. Let cool and harden completely.
Refrigerate for at least one hour before serving, then cut as desired.
