Preheat the oven to 375 degrees and line a baking sheet with parchment paper.
Cut a small slit along one side of each mini pepper and remove the seeds while keeping the pepper mostly whole.
In a mixing bowl, combine the softened cream cheese, shredded mozzarella, garlic powder, salt, and black pepper until smooth.
Spoon the cheese mixture into each pepper until filled but not overflowing.
Place the stuffed peppers on the baking sheet and bake for 12 to 15 minutes until the peppers soften slightly and the cheese begins to melt.
Remove from the oven and press two olive slices onto the front of each pepper to create eyes.