Prep Oven & Baking Sheet: Preheat oven to 400°F (200°C). Line a large rimmed baking sheet with parchment paper or lightly greased aluminum foil.
Slice & Seed Jalapeños: Wearing disposable gloves, slice each jalapeño pepper in half lengthwise through the stem. Use a small spoon to scrape out all seeds and white inner membranes (leaving membranes makes poppers significantly spicier).
Mix Velvety Cheese Filling: In a medium bowl, combine softened cream cheese, shredded cheddar, Monterey Jack, grated garlic, onion powder, smoked paprika, salt, pepper, minced chives, and cooked halal beef bacon bits (if using). Stir with a rubber spatula until completely smooth and evenly blended.
Stuff the Pepper Boats: Use a spoon or small offset spatula to generously mound the cheese mixture into each halved jalapeño boat, smoothing the surface slightly.
Toss Crunchy Buttered Panko: In a small bowl, stir together panko breadcrumbs and melted butter until breadcrumbs are evenly coated and glistening.
Crown & Bake: Dip or press the top of each stuffed jalapeño firmly into the buttered panko so a generous layer adheres to the cheese. Arrange poppers on the prepared baking sheet.
Bake to Golden Perfection: Bake for 18-22 minutes until peppers are tender-crisp, the cheese filling is bubbling hot, and the panko topping turns deeply golden-brown and crunchy. Let rest 5 minutes, garnish with chives, and serve with cool buttermilk ranch!