1 cup brown sugar
1/2 cup condensed milk
1/4 cup corn syrup
2/3 cup 100% refrigerator-type peanut butter
1. Combine brown sugar, condensed milk, and corn syrup in a medium saucepan. Cook and stir until the sugar is dissolved. Remove from the heat.
2. Add the peanut butter. Stir until smooth. Thin with more condensed milk if necessary.
Serve warm or cold over ice cream.