Preheat the oven to 350 degrees Fahrenheit and line an 8x8 inch baking pan with parchment paper or grease well with cooking spray.
In a large mixing bowl, use a hand or stand mixer to mix together the cake mix, egg, melted butter, and heavy cream until thick and smooth, 2-3 minutes. The dough will be very thick.
15.25 ounces box golden butter cake mix, 1 large egg, ¼ cup (½ stick) salted butter, 5 tablespoons heavy cream
Fold in ½ cup of the dark chocolate chips and the Rolos, and then spread the batter into the prepared pan.
¾ cup dark chocolate chips, ¾ cup (~30) Rolos
Sprinkle the remaining ¼ cup of dark chocolate chips evenly over the top and gently press into the top.
Bake for 25-30 minutes or until golden brown on top and a toothpick inserted in the center comes out with crumbs and no batter.
Allow the blondies to cool completely before cutting them into squares and serving.
Notes
Storage:
To Store: Store leftover Rolo Blondies in an airtight container at room temperature for up to a week. They can also be stored in the refrigerator for up to 2 weeks.
To Freeze: To freeze, wrap in plastic and place individual blondies in a freezer bag for up to 3 months.
Tips:
I don’t recommend using oil in this recipe.
You can add chopped nuts to the blondie batter for some added crunch.
To make a smaller or larger batch, you can adjust the ingredients accordingly and use a different size pan.
You can make many changes to this recipe to suit your preferences or needs. Some substitutions may result in a different texture or taste than the original recipe, so you may need to make adjustments to the recipe and keep an eye on the blondies while they're baking.