Preheat the oven to 400°F (200°C).
Line a baking tray with parchment paper for easy clean up.
Cut the jalapeño peppers in half lengthwise. Remove the seeds and membranes, creating jalapeño halves with hollow centers.
Combine the softened cream cheese, shredded Monterey Jack cheese, crumbled bacon, ranch seasoning mix, garlic powder, salt, and pepper in a mixing bowl. Mix until thoroughly combined.
Fill each jalapeño half with the cheese and bacon mixture, slightly mounding it.
Place the stuffed jalapeño poppers on the prepared baking sheet.
Bake in the preheated oven for about 15-20 minutes, or until the filling is hot and bubbly and the jalapeños have softened.
Once out of the oven, let the poppers cool for a few minutes before handling.
Garnish the stuffed jalapeño poppers with chopped cilantro or parsley, if desired.
Serve the Cheesy Bacon and Ranch Stuffed Jalapeño Poppers as a delicious appetizer, hot from the oven.