This recipe makes about 3 cups of dip.
1/2 cup butter
1/2 cup light corn syrup
1 cup brown sugar
1 can sweetened condensed milk (Eagle Brand, etc.)
1/2 cup peanut butter (optional)
In a large saucepan, mix all ingredients together EXCEPT for the apples. Bring to a boil.
Pour into your crockpot. Set on LOW.
Dip the dip into small bowls for everyone who wants some. Serve it with apple slices.