Preheat your oven to 200°C (390°F). Line a baking sheet with parchment paper or a silicone mat.
Slice each jalapeño in half lengthwise and carefully scoop out the seeds and membranes with a small spoon. Keep the peppers steady and remove the seeds for milder heat, or leave some seeds in for extra spice.
In a mixing bowl, combine softened cream cheese, buffalo sauce, grated cheddar, garlic powder, and a pinch of salt. Mix until smooth and well blended, tasting to adjust the buffalo sauce for desired heat and tang.
Using a small spoon or piping bag, generously fill each jalapeño half with the cheese mixture, pressing slightly to ensure it's packed in well and smooth on top.
Arrange the stuffed jalapeños on your prepared baking sheet, cut side up. Lightly sprinkle the tops with breadcrumbs for crunch and flavor if desired.
Bake in the preheated oven for 15-20 minutes, or until the cheese is bubbling and the tops are golden brown. The peppers will soften and blister slightly, creating a smoky aroma.
Once baked, remove the poppers from the oven and let them rest for about 5 minutes. The cheese will set slightly, making them easier to handle and serve.
Garnish with chopped chives or blue cheese crumbles if you like, and serve warm. These poppers are best enjoyed right out of the oven, with their cheesy, crispy tops and spicy kick.