Line an 8×8-inch pan with parchment paper or aluminum foil, using binder clips to hold it in place if necessary. Grease it with nonstick cooking spray.
In a medium saucepan, mix the salted butter, brown sugar, corn syrup, and sweetened condensed milk. Heat over medium-low, stirring constantly to blend smoothly.
Once boiling, attach a candy thermometer and stir steadily until caramel reaches 245°F; it should thicken and bubble.
Turn off heat and spoon the caramel into the prepared pan. Allow it to cool completely at room temperature.
In a microwave-safe bowl, add chocolate almond bark and shortening. Microwave in 30-second intervals, stirring after each until melted and smooth.
Once cool, slice the caramels into 35 squares or smaller for 70 bite-sized pieces.
Dip each caramel into melted chocolate, letting excess drip off, then place on parchment paper. Sprinkle with toppings while chocolate is still wet.
Store in an airtight container, slightly apart or wrapped in parchment paper.