Step 1

Preheat the oven to 375 degrees F (190 degrees C).

Step 2

Cook bacon in a large skillet and over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Drain bacon on paper towels and cool.

Step 3

Pour oil into a 12-inch cast iron skillet. Brush oil all over the interior of the skillet. Place dough into the skillet and shape into a pizza, forming a crust at the edge. Prick dough all over with a fork.

Step 4

Bake in the preheated oven for 5 minutes. Remove from oven and reshape dough if necessary. Sprinkle the top of the dough with 2 teaspoons ranch seasoning. Spread ranch dressing on top.

Step 5

Sprinkle shredded mozzarella, chicken, and red onion over pizza crust. Crumble cooled bacon on top.

Step 6

Bake in the preheated oven until cheese is melted and top is browned, about 20 minutes.

Step 7

Remove pizza from oven and top with tomato slices. Melt butter and mix in the remaining dry ranch seasoning. Brush crust with butter-ranch mixture.

Step 8

Set an oven rack about 6 inches from the heat source and preheat the oven's broiler.

Step 9

Broil pizza until cheese is golden brown, 2 to 3 minutes, being careful not to burn.