Thaw puff pastry according to package directions.
Preheat the oven to 400 degrees F (200 degrees C). Line a baking sheet with parchment paper.
Combine chicken, cream cheese, shredded cheese, bacon, jalapenos, ranch seasoning, salt and pepper in a large bowl. Mix until well combined and set aside.
Roll out 1 sheet of pastry puff with a rolling pin on a lightly floured surface until smooth. Cut into 9 squares.
Place 1 tablespoon of the chicken mixture in the center of each square. Fold each square in half into a triangle and seal the edges using a fork. Repeat with remaining pastry puff sheets.
Place stuffed puffs onto prepared baking sheet and lightly brush the tops with butter.
Bake in the preheated oven until tops are golden brown, 10 to 12 minutes.
Serve with spicy ranch dipping sauce.
