Start by preheating your oven to 375°F (190°C). This temperature helps the brie melt smoothly while allowing the outer wrap to crisp up nicely. Line a baking tray with parchment paper for easy cleanup. This small step saves time later and keeps your poppers intact.
Slice each jalapeño in half lengthwise using a sharp knife. Carefully remove the seeds and white membranes with a spoon to control the spice level. If you prefer milder poppers, rinse them lightly and pat dry before stuffing.
Cut the brie into small chunks that fit inside each jalapeño half. Place one piece into each pepper, pressing gently so it stays in place. Avoid overfilling, as the cheese expands slightly while melting.
Wrap each stuffed jalapeño with a slice of prosciutto, ham, or bacon. Make sure it’s snug but not too tight to allow even cooking. If using bacon, lightly pre-cook it for better crispiness in the oven.
Arrange the wrapped poppers on your prepared baking sheet. Bake for about 15–20 minutes until the cheese is melted and the outer layer is golden and crisp. Turn them halfway through for even cooking.
Warm the blueberry preserves slightly so they become smooth and easy to drizzle. Spoon or drizzle the warm preserves over the hot poppers just before serving. This adds that signature sweet contrast.
Sprinkle a pinch of black pepper or flaky salt on top for added flavor. Serve immediately while the cheese is still gooey and the outer layer crisp. Fresh out of the oven is when they taste best.