Preheat and Prep: Start by preheating your oven to 400°F. Line a sturdy baking sheet with parchment paper to prevent the crust from sticking and tearing.
Mix the Crust: Grab a large mixing bowl and add your raw ground chicken, 1/2 cup powdered grated Parmesan, 1/2 cup shredded Parmesan or Mozzarella, 1 full packet of chicken taco seasoning, and salt and pepper to taste. Mix thoroughly (hands work best) until it forms a thick, slightly sticky dough.
Shape the Crust: Transfer the chicken mixture onto your prepared baking sheet. Wet your hands with cold water to avoid sticking, and press the mixture out into a flat, even circle. Avoid letting the edges get too thin so they do not burn.
First Bake: Slide the baking sheet onto the center rack and bake for 10 minutes. This cooks the chicken through and firms up the base until it looks opaque and feels mostly firm.
Add the Toppings: Pull the crust out and sprinkle the 3/4 cup of shredded cheddar evenly across the hot base. Scatter the sliced black olives, diced tomatoes, and 3 tablespoons of diced jalapeno over the top. Return it to the oven for another 5 minutes until the cheddar melts and bubbles and the crust edges turn golden brown.
Make the Avocado Drizzle: While the pizza finishes baking, mix together the sour cream and mashed avocado in a small bowl. Whisk until completely smooth. If it feels too thick, add your liquid of choice one tablespoon at a time until it flows slowly off a spoon.
Finish and Serve: Take the pizza out of the oven and let it rest on the pan for a few minutes to firm up for clean slicing. Drizzle the creamy avocado sauce generously over the top, finish with a handful of fresh chopped cilantro, slice, and serve.