Slice the zucchinis in half lengthwise and scoop out the center using a small spoon to create boats. Keep the scooped out flesh aside for later use.
In a mixing bowl, combine the cream cheese, cheddar cheese, Parmesan cheese, chopped jalapeños, garlic powder, onion powder, and the scooped-out zucchini flesh. Mix well until combined.
Season the cheese mixture with salt and pepper to taste.
Carefully spoon the cheesy jalapeño mixture into each zucchini boat, filling them generously.
If using breadcrumbs, sprinkle them evenly over the stuffed zucchini for added crunch.
Place the stuffed zucchinis on a baking sheet lined with parchment paper.
Bake in the preheated oven for about 25-30 minutes, or until the zucchinis are tender and the cheese is bubbly and golden brown.
Once done, remove from the oven and let cool slightly before garnishing with fresh cilantro.
Serve warm as a delightful appetizer or side dish.
Notes
Adjust jalapeño quantity based on desired heat level.