Prep Roll Dough: In a medium-sized bowl, add flour, salt, and garlic powder and give a quick mix. In the bowl of a stand mixer, add warm water and sugar and whisk to dissolve the sugar. Add yeast. Add egg and melted butter and mix to break up the egg with the dough hook. Add the flour mixture and mix well until a sticky dough forms.
Proof: Add the sticky dough to a lightly oiled large bowl and cover with plastic wrap. Proof until it has doubled in size, about an hour.
Form Rolls: Once the dough has been proofed, grease the cast iron (or other) skillet. Separate the dough in half, then those halves in half, and half each again until you have 8 evenly sized dough balls. You can also use a scale (you may want to lightly spritz the top of the scale and your hands with oil to prevent sticking) and weigh out 8 approximately 2 oz dough balls. Add the balls to the greased skillet, around the perimeter of the skillet, leaving a little bit of space for the balls to rise again. Gently cover with a linen towel and let rise for another 30 minutes.
Mix Cheeses: Add the cream cheese to a medium-sized bowl and heat in the microwave for 20-30 seconds to soften. Add 1 1/2 cups of mozzarella cheese, Parmesan cheese, 2 teaspoons of Italian seasoning, salt, garlic powder, and onion powder, and mix well.
Preheat Oven: Preheat the oven to 350℉ and move the rack to the center.
Melt Butter: Add the butter to a small bowl and melt in the microwave. Add the fresh garlic and Italian seasoning and mix well. Once the dough balls have risen and filled the spaces between each other, use a pastry brush to brush the tops of the rolls with the melted butter and garlic.
Create the Dip: In the center of the skillet, add half of the pizza sauce and spread in an even layer. Add the cheese mixture and spread in an even layer, then add the rest of the pizza sauce. Top with the remaining 1/4 cup of mozzarella cheese and then layer the pepperoni slices.
Bake: Place the cast iron skillet in the oven and bake for 20-22 minutes until the rolls are lightly browned.
Serve and Enjoy!