Preheat oven to 400°F. Line a baking sheet with parchment paper. 

Slice the jalapenos in half lengthwise, try to keep the stem on if possible. 

Scoop out the veins and seeds of the peppers with a spoon and discard. Place peppers on the baking sheet with the cut side up. 

In a medium bowl, mix together the cream cheese, cheddar cheese, Worcestershire sauce, and garlic powder. 

In a small bowl, combine the Panko crumbs, paprika, and melted butter. Set aside. 

Fill the jalapeno peppers with the cream cheese mixture by taking a small scoop of cream cheese, shaping it into an oblong oval shape, and pressing the oval into the pepper. 

Sprinkle the breadcrumb mixture of the top of each pepper. 

Bake for 20 minutes or until golden brown on top. 

Allow to cool for 5 minutes before serving.