Preheat the oven: Set your oven to 400°F (200°C). Line a baking sheet with parchment paper or foil and lightly grease it so the poppers don’t stick.
Prep the jalapeños: Wear gloves if you have them. Slice each jalapeño in half lengthwise.
Use a small spoon to scrape out the seeds and white membrane. For extra heat, leave a bit of the membrane intact.
Make the filling: In a bowl, mix cream cheese, cheddar, sour cream (if using), garlic powder, onion powder, paprika, salt, and pepper. Stir until smooth and well combined.
Make the topping: In a separate small bowl, toss panko with olive oil or melted butter and a pinch of salt.
The crumbs should be lightly coated so they toast up golden.
Fill the peppers: Spoon or pipe the cheese mixture into each jalapeño half, filling just to the rim. Don’t overfill—overflow tends to scorch.
Add crunch: Sprinkle each stuffed jalapeño with the panko mixture, pressing gently so it adheres.
Bake: Arrange the jalapeños cut side up on the prepared baking sheet. Bake for 16–20 minutes, until the peppers are tender and the topping is golden brown.
For extra color, broil for 1–2 minutes at the end (watch closely).
Finish and serve: Let them cool for 5 minutes so the filling sets. Sprinkle with chives or green onions. Serve warm with lime wedges if you like a bright finish.