Preheat the oven to 375 degrees and line a baking sheet with parchment paper.

Cut a thin slice off the top of each mini pepper and remove the seeds and membranes. Use a small knife to carve simple jack-o'-lantern faces on one side of each pepper.

In a mixing bowl, combine the softened cream cheese, shredded cheddar cheese, sour cream, garlic powder, and salt. Stir until the mixture is smooth and evenly blended.

Spoon the cheese filling into each carved pepper, packing it gently so the faces stay visible.

Place the stuffed peppers on the prepared baking sheet and bake for 10 to 12 minutes, until the filling is warm and slightly melted.

Remove from the oven and let them cool for a few minutes before serving.