Preheat oven to 425°F (218°C).
In a mixing bowl, combine the cooked chopped chicken, softened cream cheese, ranch dressing, and Frank's RedHot sauce; stir until evenly mixed.
Lightly spray a 24–30 cup muffin tin with nonstick spray.
Place one wonton wrapper into each muffin cup, pressing to form a cup shape and ensuring the edges are folded against the sides.
Fill each wonton wrapper with the buffalo chicken mixture, dividing the mixture evenly among all 30 cups.
Bake for 18–22 minutes, until the wonton edges are crispy and golden brown.
Remove the tin from the oven and let the cups cool for a few minutes, then transfer to a cooling rack if desired.
Top each cup with chopped chives before serving.