Preheat the oven to 375°F (190°C) and line a baking sheet with parchment paper.

Cut the tops off the mini sweet peppers and remove the seeds and membranes.

In a mixing bowl, combine cream cheese, cheddar cheese, garlic powder, onion powder, salt, and pepper. Mix until smooth.

Stuff each mini pepper with the filling using a spoon or piping bag.

Place the stuffed mini peppers upright on the prepared baking sheet.

Bake in the preheated oven for 15 to 20 minutes until the peppers are tender and the cheese is melted.

Let the peppers cool for a few minutes, then garnish with chopped chives.

Serve warm as an appetizer.