BLESS THIS MESS
In a medium saucepan, melt butter over medium heat.
Add the brown sugar, corn syrup, and sweetened condensed milk, stirring to combine.
Stir constantly until mixture comes to a light bubbly boil, with just a few bubbles popping through the surface of the caramel
Remove from heat right away and add the vanilla. Stir to combine.
Serve warm or at room temperature with apple slices and pretzels, or drizzle over ice cream.