Toast almonds in a skillet or oven.
Sprinkle 1/2 cup of the toasted almonds in a 13" x 9" pan.
In a medium saucepan, combine butter and sugar over medium heat.
Cook until mixture reaches 280°F, stirring often.
Once it reaches 280°, pour sugar caramel mixture over almonds.
Heat chocolate chips and shortening in a microwave-safe bowl at 30-second intervals until melted. Stir well.
Pour chocolate over the caramel layer.
Top with additional almonds and allow to set at least 3-4 hours.
Once the candy is set, break apart carefully with a butterknife or spatula.