Preheat the oven to 375°F (190°C). Line a baking sheet with parchment paper or a silicone baking mat.
Prepare the cheese shells: Place the cheese slices on the prepared baking sheet, leaving some space between each slice. Bake for 5-7 minutes, or until the edges begin to brown and the cheese is bubbling.
Make the filling: In a bowl, mix together the diced jalapeños, softened cream cheese, shredded mozzarella, crumbled bacon, garlic powder, onion powder, and smoked paprika until well combined.
Assemble the taquitos: Remove the cheese slices from the oven and let them cool for about 1 minute until they are firm enough to handle but still pliable. Spoon a small amount of the jalapeño popper mixture onto one edge of each cheese slice, then carefully roll them up into taquito shapes.
Return to the oven: Place the rolled taquitos back onto the baking sheet, seam side down, and bake for an additional 3-5 minutes to allow them to set.
Garnish and serve: Let the taquitos cool for a couple of minutes before serving. Sprinkle with chopped cilantro if desired and enjoy while crispy!