Preheat your oven to 425°F (220°C). Roll out the pizza dough on a floured surface or baking sheet to your desired thickness.
Optional: Pre-bake the dough for 5 minutes to ensure a crispier crust.
In a large skillet over medium heat, cook the ground beef until browned. Drain the excess grease thoroughly.
Stir the taco seasoning and water into the beef according to the package directions. Simmer for 3-5 minutes until the liquid thickens.
In a small bowl, mix the refried beans and taco sauce together until smooth. Spread this mixture evenly over the pizza crust as the base sauce.
Top the bean layer with the cooked ground beef and shredded cheese.
Bake for 12-15 minutes, or until the crust is golden brown and the cheese is melted and bubbly.
Remove the pizza from the oven and let it cool for about 5 minutes.
Top with cold ingredients: shredded lettuce, cherry tomatoes, and crushed tortilla chips. Drizzle with sour cream before slicing and serving.