Lightly spray 3 (12-cup) mini muffin pans with nonstick cooking spray; set aside.
In a large saucepan, heat butter over medium heat until butter is melted. Add sugars, water, and corn syrup, stirring to combine well. Cook, stirring until sugar dissolves. Raise heat to medium-high. Bring mixture to a boil. Cook, stirring constantly with a wooden spoon, until mixture reaches 300° on a candy thermometer. Remove from heat, and stir in 1 cup toasted almonds. Working quickly, carefully spoon about 1 tablespoon sugar mixture into prepared muffin pans.
In a small bowl, combine chocolate morsels and vegetable shortening. Microwave on High in 30-second intervals, stirring after each, until melted and smooth (approximately 1½ minutes total). Spoon about 2 teaspoons chocolate mixture on top of sugar mixture, spreading chocolate to edges of muffin cup. Sprinkle remaining ½ cup almonds on top of chocolate. Let stand for 1 hour, or until chocolate is set.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/almond-roca/