Prepare the Jalapeños. Start by slicing the jalapeños in half lengthwise. Scoop out the seeds and membranes, depending on how spicy you want the poppers. Rinse and pat dry.
Make the Filling. In a bowl, mix the cream cheese, shredded cheddar, garlic powder, green onions (if using), salt, and pepper. This will be your cheesy filling for the poppers.
Stuff the Jalapeños. Using a spoon, fill each jalapeño half with the cheese mixture. Make sure they are evenly filled, but don’t overstuff.
Coat the Poppers. In a separate bowl, beat the egg. Dip each filled jalapeño into the egg, then roll in breadcrumbs until fully coated.
Bake to Perfection. Preheat your oven to 375°F. Place the poppers on a baking sheet lined with parchment paper. Bake for 20-25 minutes or until the jalapeños are tender and the breadcrumbs are golden brown.
Garnish and Serve. Let the poppers cool slightly before serving. You can garnish them with fresh cilantro or serve with a dipping sauce like ranch or sour cream.