In a mixing bowl, combine cake mix, eggs, and oil. Beat until fully incorporated.
Stir in butterscotch morsels.
Pour batter into a parchment lined 9x9 cake pan and bake at 350 degrees for 15 - 20 minutes, or until a toothpick comes out clean. Allow blondies to cool completely.
When blondies are cooled, pour second package of butterscotch morsels into a microwave safe bowl. Heat in 20 second increments (stirring in-between) until morsels are completely melted.
Add buttercream frosting to melted morsels and mix well. Spread fudge mixture over blondies.
Allow fudge to set (I prefer to do this in my refrigerator), then remove blondies from pan, cut into squares and dust with powdered sugar.
Open up your favorite Harry Potter book, brew a cup of tea, and ENJOY!
Notes
Calories are automatically generated. For best results calculate based on your exact ingredients.