Prepare the macaroni noodles according to package directions as you prepare the cheese sauce. Drain when done, but do not rinse.
Place 6 Tablespoons of the butter in a large pot over medium heat.
Once butter is melted, stir in the flour to form a paste.
Whisk in the milk, ensuring the flour mixture dissolves completely.
Add in the heavy whipping cream, cream cheese and 1 1/2 cups of the cheese. Stir occasionally until cheeses are completely melted.
Chop all but a few of the jalapeño peppers, reserving a few for garnish.
Stir in the garlic powder, the chopped jalapeños, and most of the bacon, reserving some for garnish.
Fold the macaroni and cheese into an 8" x 8" casserole dish.
Preheat oven to 350F.
In a skillet over medium heat, melt the remaining 2 Tablespoons butter.
Once melted and hot, stir in the breadcrumbs and toast until golden. Remove from heat.
Sprinkle remaining cheese over the macaroni and cheese, followed by the toasted breadcrumbs and reserved bacon and jalapeños.
Bake for 20-25 minutes until cheese is fully melted and as browned as you'd like.