Prep the jalapeños: Heat the oven to 400°F. Line a baking sheet with parchment paper. Cut the jalapeños in half lenghtwise and carefully cut out the seeds and membranes with a pairing knife, making sure not to poke through the flesh of the pepper. I like to loosen the seeds with the knife and then gently scoop them out with a small spoon. YouPro-tip: Wear gloves when de-seeding the peppers!
The Filling: In a medium bowl, mix the 8 ounces cream cheese, 1 cup shredded cheddar, 1/4 cup sliced green onions, 1/2 teaspoon garlic powder, 1/2 teaspoon smoked paprika and 1/2 teaspoon kosher salt until smooth.
The Crunch Factor: Melt the 2 tablespoons butter in a small skillet. Add the 1 cup panko and 1 teaspoon Tajín and stir to combine.
Assemble: Stuff each jalapeño half with the cheese mixture (don't overfill, or they'll "leak" in the oven). You will have enough filling for at least 10 jalapeños but maybe 12 depending on how large the jalapeños are. Press the cheese side down into the Panko mixture to coat the top.
Roast: Place poppers on the sheet pan, cheese-side up. Roast for 20-25 minutes until the peppers are tender and the Panko is golden brown.
Blend the Dip: While the peppers roast, whisk together the dip ingredients until smooth.
Serve: Serve the poppers hot with a drizzle of the dip or the dip on the side for dunking..