Step 1
Preheat an oven to 450 degrees F (230 degrees C). Scrub and dry potatoes then prick several times with a fork and place onto a baking sheet.
Step 2
Bake in preheated oven until potatoes are easily pierced with a fork 50 minutes to 1 hour. Remove cool and peel.
Step 3
Place bacon in a large skillet and cook over medium-high heat turning occasionally until evenly browned about 10 minutes. Drain bacon slices on paper towels; crumble.
Step 4
Preheat oven to 400 degrees F (205 degrees C). Lightly grease a pizza pan.
Step 5
Mix pizza crust mix water and oil in a large bowl with a fork until ingredients combine. When dough has pulled together turn it out onto a lightly floured surface and knead until smooth and elastic about 8 minutes. Let stand for 5 minutes. Shape dough into a flat circle and place on pizza pan. Build up edges slightly.
Step 6
Bake pizza dough in preheated oven until crust is firm and begins to brown 5 to 6 minutes.
Step 7
Toss butter with garlic powder Italian seasoning and potatoes in a large bowl. Combine sour cream and ranch dressing in a small bowl; spread over crust. Top with potato mixture bacon onions mozzarella cheese and Cheddar cheese.
Step 8
Bake in preheated oven until cheese is melted and lightly browned 15 to 20 minutes. Let stand 5 minutes before cutting.